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BEGIN:VEVENT
DTSTART;VALUE=DATE:20240530
DTEND;VALUE=DATE:20240607
DTSTAMP:20260501T223438
CREATED:20240530T085531Z
LAST-MODIFIED:20240530T092229Z
UID:4219-1717027200-1717718399@tqmatter.org
SUMMARY:Quantum matter working group meeting
DESCRIPTION:Workshop Overview: \nThe purpose of this meeting is to share and come up with ideas and possibly set up new collaborative projects. We hope to facilitate this by having a loose schedule and plenty of time for informal discussions. A schedule for talks\, subject to change\, can be found here.\nThe topics up for discussion include:\nActive superconducting matter\nDynamics in magnetic\, ferroelectric\, and superconducting materials\nDark matter detection with quantum materials\n  \nTentative Schedule: \nFrank Kruger (UCL)\, May 30 – 31\nTim Wehling (U Hamburg)\, May 30 – 31\nFrancesco Giazotto (SNS) May 30 – June 2\nWei Ku (SJTU)\, May 30 – June 6\nEmily Been (UCLA)\, May 30 – June 6\nOlivia Liebman (UCLA)\, May 30 – June 6\nRubén Seoane Souto (CSIC) May 30 – June 6\nGabriel Aeppli (PSI)\, June 2 – 6\nShizeng Lin (LANL)\, June 2 – 6\nCarlo Canali (LNU)\, June 3 – 4\nMatthias Geilhufe (Chalmers)\, June 3 – 5\n  \nVenue: Nordita\, Albano House 3\, Conference Center\, Room 4208\nHannes Alfvéns väg 12\, 114 19 Stockholm\n[Website]\nPhone: 08-553 784 44\nLocation: 59.354240\, 18.056543\nStockholm\, Sweden \n  \nWorkshop Administrator: Jimmie Evenholt (Nordita)\nEmail: [jimmie.evenholt@su.se] \nSupported by: Nordita\, Materials Platform KTH\, QTH\, Quantum Initiative UConn.
URL:https://tqmatter.org/event/quantum-matter-working-group-meeting/
LOCATION:NORDITA\, 11 Roslagstullsbacken\, Stockholm\, Sweden
CATEGORIES:Meeting
ORGANIZER;CN="Alexander V. Balatsky%2C NORDITA Stockholm%2C Sweden":MAILTO:balatsky@kth.se
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20231211
DTEND;VALUE=DATE:20231213
DTSTAMP:20260501T223438
CREATED:20230427T070552Z
LAST-MODIFIED:20230926T135511Z
UID:3947-1702252800-1702425599@tqmatter.org
SUMMARY:Materials for Quantum Technologies Workshop
DESCRIPTION:Workshop Overview: \nThe arrival of quantum technologies is set to reshape the information age. Materials\, especially those tailored with specific properties\, are paramount for ushering in these novel advancements. Development\, synthesis\, and precise modeling of materials are the core pillars for the successful implementation of future quantum technologies. Funding initiatives such as Wallenberg WACHT\, WINQ\, and WISE emphasize the significance of quantum materials. \n\nThis workshop aims to address the requisites and progression of materials pivotal for quantum technologies. Through discussions\, collective projects\, and brainstorming on innovative materials suitable for quantum processors\, we strive to nurture a cooperative atmosphere. The goal is to identify and assess new potential materials that might propel the upcoming quantum devices and technologies. \n\nBy bringing together researchers\, industry experts\, and funding agencies\, we plan to navigate the hurdles of executing quantum technologies\, especially quantum computing\, at a broader outlook level. \n\nInvitees (confirmed) \n G. Aeppli (PSI/ETH)\,C. Ahn (Yale)\, D. Haviland (KTH)\, M. Fogelstrom (Chalmers)\, J. Wiesenrieder (KTH)\,  P. Krogstrup (NBI)\, K. Flensberg (NBI). \nOrganizers \n– A. Balatsky \n– A. Black Schaffer \n– J. Haraldsen\n– F. Lombardi \n  \nTentative Schedule: \n  \n**December 10:**\n– **16:00 – 18:00** – Registration at Nordita\, 6th floor\n– **19:00** – Optional Dinner \n  \n**December 11:**\n– **09:00 – 09:30** – Introduction\, Goals\, Plans\n– **Materials for SC Quantum Platforms:**\n– **09:30 – 10:15** – Talk 1\n– **10:15 – 11:00** – Talk 2\n– **11:00 – 11:45** – Talk 3\n– ** 11:45-13:00** –  Lunch Break\n– **13:00 – 13:45** – Talk 3\n– **13:45 – 14:30** – Talk 4\n– **14:30 – 15:15** – Coffee Break\n– **15:15 – 16:00** – Round Table Breakouts\n– **16:00 – 17:00** – Round Table Discussion \n  \n**December 12:**\n– **Materials for Solid State Platforms: q bits and sensors**\n– **09:00 – 9:45** – Talk 5\n– **9:45 – 10:15** – Talk 6\n– **10:15 – 11:00** – Coffee Break\n– **11:00 – 11:45** – Talk 7\n– **11:45 – 12:15** – Talk 8\n– **12:15-14:00**   – Lunch break\n– **14:00 – 14:45** – Talk 8\n– **14:45 – 15:15** – Talk 9\n– **15:15 – 15:45** – Talk 10\n– **Coffee Break\n– **16:30 – 17:30** – Round Table Breakouts\n-**17:30-18:30** – Round Table Discussions/Summary/Closing \n  \nVenue: Albano House 1\, Auditorium “Pärlan”\n[Website]\nPhone: 08-553 784 44\nLocation: 59.354240\, 18.056543\nStockholm\, Sweden \n  \nWorkshop Administrator: Jimmie Evenholt (Nordita)\nEmail: [jimmie.evenholt@su.se] \nSupported by: Nordita\, Materials Platform KTH\, QTH\, Quantum Initiative UConn.
URL:https://tqmatter.org/event/materials-for-quantum-technologies-workshop/
LOCATION:Albano House 1\, Pärlan\, Albanovägen 26\, Stockholm\, Stockholm\, 11419\, Sweden
CATEGORIES:Meeting
ORGANIZER;CN="Alexander V. Balatsky%2C NORDITA Stockholm%2C Sweden":MAILTO:balatsky@kth.se
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20230607T100000
DTEND;TZID=Europe/Stockholm:20230610T140000
DTSTAMP:20260501T223438
CREATED:20230209T105822Z
LAST-MODIFIED:20230609T083629Z
UID:3879-1686132000-1686405600@tqmatter.org
SUMMARY:“Dynamical and Hidden Orders” (BalCon TP 2023)
DESCRIPTION: June 6 (arrival day) – 10\, 2023\nAt Albano campus\, House 2\, Auditorium 4 (Albanovägen 16\, 114 19 Stockholm) – canteen Proviant building\, 2 floors down (see the  Campus map and  Google map) and via  Zoom .\nNote that on Saturday\, June 10\, all the activities will be in building 3 (Nordita)\, floor 6\, Mega room. \n\n    \n \nThis program aims to bring together condensed matter theorists and experimentalists of the Baltic region as well as from outside. The structure and program of the meeting makes sure that novel and exciting research directions within the fields of quantum technologies and quantum materials are in the focus of attention. \nThe topics include the following subjects:\n• Hidden and entangled orders\n• Dynamics of quantum matter\n• Non-Hermitian dynamics\n• Dark matter as hidden order and its detection\n• Emergent order at interfaces \nOrganization\nDuring each day\, there will be two to three 30 min talks of invited speakers introducing the topic\, followed by discussion time of approximately the same duration as the talks\, which is anticipated as creative and open exchange of ideas\, with in particular encouraging the junior participants to engage with the subject. In addition\, there will be several junior speaker sessions\, presenting recent results in 15 min talks followed by the same amount of discussion time. This format ensures that the Frauenfelder rules will be satisfied. \nThe first invited speaker in each day will be asked to provide a didactic introduction to the subject which introduces the junior participants into the concepts important for the following talks. \nWe expect about 40 external participants in the workshop. Accommodation for invited speakers will be provided within Stockholm. We are also aiming for one evening outreach event within the framework of the Niels Bohr Colloquium at NORDITA Stockholm. We anticipate as speaker Frank Wilczek. We will strive make the lectures available online. \nList of invited speakers \n\nAnnica Black-Schaffer (Uppsala)\nRiccardo Catena (Chalmers)\nJonas Ola Oscar Larson (Stockholm Uni)\nAnton Frisk Kockum (Chalmers)\nFrancesco Giazotto (Pisa\, IT)\nPeter Krogstrup (NBI\, Copenhagen)\nJose Lado (Aalto)\nMartin Leijnse (Lund)\nShizeng Lin (LosAlamos\, US)\nFloriana Lombardi (Chalmers)\nMikko Möttönen (Aalto)\nAbhay Pasupathy (Brookhaven National Laboratory\, US)\nJanine Splettstoesser (Chalmers)\nAsle Sudbo (Trondheim)\nSaulius Vaitiekenas (NBI\, Copenhagen)\nFrank Wilczek (SU/MIT) – colloquium speaker\n\nPreliminary schedule\nThe meeting will take place in a hybrid format both in the Albano Building 2\, Auditorium 4 (canteen Proviant building\, 2 floors down) and via  Zoom . All the speakers are supposed to be in person. \n\n\n\n\nSpeaker\nDate and Time\nLecture title\n\n\nWed\, June 7\n\n\nOrganizers\n9:45 – 10:00\nConference opening\n\n\nStephanie Matern (Lund)\n10:00-10:15\nInteracting parallel quantum dots: Metastability and quantum sensing \n\n\n\nClaudia Castillo-Moreno (Chalmers)\n10:15-10:30\nDynamical control of excitation in atom-photon bound states in microwave photonic crystal\n\n\n\nGerard Higgins (Chalmers)\n10:30-10:45\nLevitated superconductors for dark matter searches\n\n\n\nFrancesco Pandolfi (INFN\, Rome)\n10:45-11:00\nSearching for Dark Matter with Vertically-Aligned Carbon Nanotubes: the ANDROMeDa Project.\n\n\n\nAll participants\n11:00 – 12:00\nScientific discussion\n\n\n\n12:00 – 14:00\nLunch break\n\n\nFrank Wilczek\n14:00-15:00\nNiels Bohr Colloquium “Quanta of the Third Kind: Anyons”\n\n\nAnton Frisk Kockum\n15:00-15:30\nGiant atoms — a new frontier in quantum optics\n\n\n\nJonas Ola Oscar Larson\n15:30-16:00\nQuantum optics in terms of Fock state lattices\n\n\n\n16:00 – 17:00\nCoffee break + 0.5h scientific discussion\n\n\nLucas Baldo (Uppsala)\n17:00-17:15\nDefect-induced band restructuring and length scales in twisted bilayer graphene\n\n\n\nAdolfo Fumega (Aalto)\n17:15-17:30\nArtificial multiferroic order in twisted Chromium 2D ferromagnets\n\n\n\nClaudia Artiaco (KTH)\n17:30-17:45\nThe time evolution of local information\n\n\n\nPaolo Molignini (SU)\n17:45-18:00\nDissipative Boundary State Preparation\n\n\n\nThu\, June 8\n\n\nMartin Leijnse\n9:00 – 9:30\nCreating\, detecting and controlling Majoranas in short quantum dot-based Kitaev chains\n\n\nAbhay Pasupathy\n9:30 – 10:00\nCoupling Magnetic Order and Superconductivity in an Iron Pnictide\n\n\n\n10:00 – 11:30\nCoffee break + 1h scientific discussion\n\n\nFloriana Lombardi\n11:30 – 12:00\nExploring the effects of strain tuning on the strange metal  phase\, charge  order and superconductivity in underdoped nm scale cuprates\n\n\nAnnica Black-Schaffer\n12:00 – 12:30\nNew mechanisms and materials for odd-frequency superconductivity\n\n\n\n12:30 – 14:30\nLunch break\n\n\nShizeng Lin\n14:30-15:00\nTopological Flat Bands in 2D Materials under Periodic Strain\n\n\nFrancesco Giazotto\n15:00-15:30\nA Josephson Bipolar Quantum Heat Engine\n\n\n\n15:30 – 17:00\nCoffee break + 1h scientific discussion\n\n\nDebmalya Chakraborty (Uppsala)\n17:00-17:15\nQuasiparticle interference as a direct experimental probe of bulk odd-frequency superconducting pairing\n\n\n\n\nPatrick Wong (Nordita)\n17:15-17:30\nAppearance of Odd-Frequency Superconductivity in a Relativistic Scenario\n\n\n\nJoris Schaltegger (Nordita)\n17:30-17:45\nVortex Excitations of Dirac Bose-Einstein Condensates\n\n\n\nPatric Holmvall (Uppsala)\n17:45-18:00\nRobust and tunable coreless vortices and fractional vortices as direct signature of chiral d-wave superconductivity\n\n\n\nFri\, June 9\n\n\nAsle Sudbo\n9:00 – 9:30\nSpin-fluctuations and unconventional superconductivity in heterostructures of magnetic insulators and gapless fermion systems\n\n\nJose Lado\n9:30 – 10:00\nEngineering and probing two-dimensional heavy-fermion quantum matter\n\n\n\n10:00 – 11:00\nCoffee break + 0.5h scientific discussion\n\n\nMikko Möttönen\n11:00 – 11:30\nQuantum-circuit refrigerator – a tool for engineering quantum thermodynamics\n\n\nFabio Costa (Nordita WINQ)\n11:30 – 11:45\nQuantum causal structures and quantum non-Markovianity\n\n\nCaio Naves (online->SU)\n11:45 – 12:00\nStudies on the generalized elephant quantum walk\n\n\n\n12:00 – 14:00\nLunch break\n\n\nDushko Kuzmanovski (Nordita)\n14:00-14:15\nKapitza stabilization of quantum critical order\n\n\n\nLuca Banszerus (NBI)\n14:15-14:30\nTransport in frustrated Josephson junction arrays in the Dice lattice\n\n\n\nIlaria Maccari (SU/KTH)\n14:30-14:45\nBeyond the Cooper-pair paradigm: first experimental signatures of a fermion quadrupling condensate that breaks time-reversal symmetry\n\n\n\nMaximilian Nitsch (Lund)\n14:45-15:00\nTransport-based Fusion via parity blockade in Majorana boxes\n\n\n\nRiccardo Catena\n15:00 – 15:30\nModelling dark matter-electron interactions in materials\n\n\n\n15:30 – 17:00\nCoffee break + 1h scientific discussion\n\n\nEinar Urdshals (Chalmers)\n17:00-17:15\nGraphene as a Dark Matter Detector\n\n\n\nCarl Peter Romao (ETH)\n17:15-17:30\nChiral phonons as dark matter detectors\n\n\n\nAndrea Maiani (NBI)\n17:30-17:45\nNonsinusoidal current-phase relations in semiconductor-superconductor-ferromagnetic insulator devices\n\n\n\nOladunjoye Awoga (Lund)\n17:45-18:00\nControlling Majorana hybridization in magnetic chain-superconductor systems\n\n\n\nSat\, June 10\nAll activities will be in Mega (Nordita building 3\, 6th floor)\n\n\n\nJanine Splettstoesser\n9:00 – 9:30\nDynamics of energy-transport through quantum dots\n\n\nSaulius Vaitiekenas\n9:30 – 10:00\nCoulomb spectroscopy of full-shell hybrids islands\n\n\n\n10:00 – 11:30\nCoffee break + 1h scientific discussion\n\n\n\nShu Suzuki (Twente)\n11:30-11:45\nSupercurrent inversion by flat-band Andreev bound states\n\n\n\nDanilo Nicolic (Greifswald)\n11:45-12:00\nGeneration of long-ranged spin-triplet pairs across a two-dimensional superconductor/helimagnet van der Waals interface\n\n\n\nKevin Marc Seja (Chalmers)\n12:00-12:15\nQuasiclassical theory & finite element method for transport in superconducting hybrid structures\n\n\n\nNiclas Wall Wennerdal (Chalmers)\n12:15-12:30\nMachine learning method for quasiclassical theory of superconductivity\n\n\n\n\n12:30 – 14:30\nLunch break + scientific discussions + closing remarks\n\n\n\n\nSponsored and Hosted by:\nNordic Institute for Theoretical Physics\nBaltic Consortium for Theoretical Physics\nICAM I2CAM
URL:https://tqmatter.org/event/balcon-tp-2023/
LOCATION:Albano House 2\, Albanovägen 16\, Stockholm\, 114 19\, Sweden
CATEGORIES:Meeting
ORGANIZER;CN="Alexander V. Balatsky%2C NORDITA Stockholm%2C Sweden":MAILTO:balatsky@kth.se
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Helsinki:20211012T170000
DTEND;TZID=Europe/Helsinki:20211012T180000
DTSTAMP:20260501T223438
CREATED:20211008T070750Z
LAST-MODIFIED:20211011T114457Z
UID:3798-1634058000-1634061600@tqmatter.org
SUMMARY:Seminar - Prof. Andrei Derevianko - University of Nevada\, Reno
DESCRIPTION:Searches for dark matter and exotic astrophysics with networks of quantum sensors.\nAs precision quantum sensors  become ubiquitous\, it is natural to combine them into networks. \nI will focus on searches for exotic physics signals with networks of quantum sensors. Most of my work \nis related to atomic clocks and I will give a general introduction to atomic clocks. Then I will describe our search for clumpy dark \nmatter using 20 years of archival atomic clock data from GPS satellites. In the second part\, I will cover searches for wavy and stochastic \nultralight dark matter. Finally\, I will present our proposal for a search for exotic physics signals correlated with LIGO-detected gravitational \nwaves\, which may provide the first experimental signature of quantum gravity in black-hole mergers. \nGroup website \nPublications \n\n\n\n\n\n\n\n\n\n\nZoom Link: https://kth-se.zoom.us/j/65402409218\nZoom ID: 654 0240 9218\nDate: Tuesday\, Oct 12\nTime: 5pm CEST/9am Pacific time
URL:https://tqmatter.org/event/seminar-andrei-derevianko-university-of-nevada-reno/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Helsinki:20210817T160000
DTEND;TZID=Europe/Helsinki:20210817T170000
DTSTAMP:20260501T223438
CREATED:20210813T084243Z
LAST-MODIFIED:20210815T113612Z
UID:3778-1629216000-1629219600@tqmatter.org
SUMMARY:Seminar - Glenn Wagner - Oxford University
DESCRIPTION:Kekule spiral order in twisted bilayer graphene\n\nTwisted bilayer graphene has attracted a lot of attention due to the presence of correlated insulators proximate to superconductivity. In this talk I will present a new proposal for the nature of the correlated insulators. This order\, which we dub the ‘incommensurate Kekule spiral’ (IKS) order\, spontaneously breaks both the emergent valley-charge conservation and moire translation symmetries. The IKS state emerges as the ground state in detailed self-consistent Hartree-Fock calculations at any non-zero integer filling of the moire unit cell. I will discuss the phenomenological and microscopic properties of this order and argue that our findings are consistent with all experimental observations reported so far\, suggesting a unified explanation of the global phase diagram of twisted bilayer graphene in terms of the IKS order.\n\n\n\nZoom Link: https://kth-se.zoom.us/j/63336816369\nZoom ID: 633 3681 6369\nDate: Tuesday\, Aug 17\nTime: 4pm Stockholm time
URL:https://tqmatter.org/event/seminar-glenn-wagner/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Helsinki:20210525T160000
DTEND;TZID=Europe/Helsinki:20210525T170000
DTSTAMP:20260501T223438
CREATED:20210525T140040Z
LAST-MODIFIED:20210422T093321Z
UID:3442-1621958400-1621962000@tqmatter.org
SUMMARY:Seminar - Prof. Björn Trauzettel - University of Würzburg
DESCRIPTION:Direct detection of odd-frequency superconductivity\nOdd-frequency superconductivity is a dynamical phenomenon. The time-dependence of the anomalous Green function matters. Therefore\, a dynamical response is needed to directly detect odd-frequency superconductivity. We propose a novel type of detection scheme based on two-pulse\, time-resolved ARPES noise measurements. Remarkably\, the experimental response is directly proportional to the anomalous Green function at unequal times. \n\nZoom Link: https://kth-se.zoom.us/j/69314760347\nZoom ID: 693 1476 0347\nDate: Tuesday\, May 25\nTime: 4pm Stockholm time
URL:https://tqmatter.org/event/seminar-prof-bjorn-trauzettel-university-of-wurzburg/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210420T150000
DTEND;TZID=Europe/Paris:20210420T160000
DTSTAMP:20260501T223438
CREATED:20210401T100527Z
LAST-MODIFIED:20210422T093019Z
UID:3439-1618930800-1618934400@tqmatter.org
SUMMARY:Seminar - Prof. Akito Daido - Kyoto University
DESCRIPTION:Spectral bulk-boundary correspondence of odd-frequency Cooper pairs\nSurface physics dominated by the bulk properties is attracting much attention. For example\, bulk-boundary correspondence predicts topological surface states. Another important context where surface properties are determined by the bulk is the electric polarization: surface electric charge is the bulk property modulo a quantum [1]. This fact might be regarded as a kind of BBC\, in the sense that physical quantity apparently sensitive to the surface properties is determined by the bulk. It is an interesting question whether other physical quantities satisfy this “BBC”.\nRecently\, Tamura et al. proposed by numerics that surface accumulation of odd-frequency Cooper pairs is the bulk property[2]. They named this relation “spectral bulk-boundary correspondence (SBBC)”. SBBC is an interesting relation\, but formal proof and physical explanation have been lacking. \nIn this work\, we prove SBBC based on the analogy with electric polarization: SBBC can be regarded as the polarization of the chirality. We discuss the similarities and differences between electric and chirality polarizations. \n[1] D. Vanderbilt and R. D. King-Smith\, Phys. Rev. B 48\, 4442 (1993).\n[2] S. Tamura\, S. Hoshino\, and Y. Tanaka\, arXiv:1809.05687. \n\nZoom Link: https://kth-se.zoom.us/j/64845990719  \nZoom ID: 648 4599 0719\nDate: Tuesday\, April 20\n\nTime: 3pm Stockholm time
URL:https://tqmatter.org/event/seminar-prof-akito-daido-kyoto-university/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210413T160000
DTEND;TZID=Europe/Paris:20210413T170000
DTSTAMP:20260501T223438
CREATED:20210401T090946Z
LAST-MODIFIED:20210406T111940Z
UID:3413-1618329600-1618333200@tqmatter.org
SUMMARY:Seminar - Prof. Philip Phillips - University of Illinois at Urbana-Champaign
DESCRIPTION:Beyond BCS: An Exact Model for Superconductivity and Mottness\nHigh-temperature superconductivity in the cuprates remains an unsolved problem because the cuprates start off their lives as Mott insulators in which no organizing principle such a Fermi surface can be invoked to treat  the electron interactions.  Consequently\, it would be advantageous to solve even a toy model that exhibits both Mottness and superconductivity.  Part of the problem is that the basic model for a Mott insulator\, namely the Hubbard model is unsolvable in any dimension we really care about.  To address this problem\, I will start by focusing on the overlooked Z_2 emergent symmetry of a Fermi surface first noted by Anderson and Haldane. Noting that Mott insulators break this emergent symmetry\, I show that the simplest model that suffices to describe Mottness is the Hatsugai-Kohmoto model. This model will then be solved exactly to reveal how superconductivity emerges in a doped Mott insulator\, thereby forming a new paradigm for superconductivity in the copper-oxide superconductors. \n[1] P. Phillips\, L. Yeo\, E. Huang\, Nature Physics\, 16\, 1175-1180 (2020).  \n\n\nZoom Link: https://kth-se.zoom.us/j/65364325632   \n\n\nZoom ID: 653 6432 5632 \n\n\nDate: Tuesday\, April 13 \n\n\nTime: 4pm Stockholm time
URL:https://tqmatter.org/event/seminar_p_phillips_uiuc/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20210209T153000
DTEND;TZID=Europe/Stockholm:20210209T163000
DTSTAMP:20260501T223438
CREATED:20210208T181848Z
LAST-MODIFIED:20210208T181902Z
UID:3349-1612884600-1612888200@tqmatter.org
SUMMARY:Group Meeting
DESCRIPTION:Internal Group Meeting
URL:https://tqmatter.org/event/group-meeting-14/
CATEGORIES:Group Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210203T170000
DTEND;TZID=Europe/Paris:20210203T180000
DTSTAMP:20260501T223438
CREATED:20210122T152136Z
LAST-MODIFIED:20210122T204238Z
UID:3316-1612371600-1612375200@tqmatter.org
SUMMARY:Seminar - Jason T. Haraldson - University of North Florida
DESCRIPTION:Examining multi-band effects on the electronic compressibility of a 2D electron gas: Insights into the negative compressibility of LAO/STO \nIn this study\, we investigate the consequences of two electronic bands at the negative electronic compressibility (NEC) cross-over point for a two-dimensional electron gas (2DEG) using a simple homogeneous model with Coulombic interactions and first-order multi-band coupling. We examine the role of effective mass and relative permittivity in relation to the critical carrier density at the cross-over point through a comparison of one- and two-band models. In general\, it is shown that the population of a second band\, along with the presence of inter-band coupling\, can dramatically change the cross-over carrier density. Given the difficulty in determining and confirming multi-band electronic systems\, this model provides a potential method for identifying multi-band electronic systems using precise bulk electronic properties measurements. To help illustrate this method\, we apply our results to the observed NEC in the 2D electron gas at the interface of LaAlO3/SrTiO3 (LAO/STO) and determine that\, for the known parameters of LAO/STO\, the system is likely a realization of a two-band 2D electron gas. Furthermore\, we provide general limits on the inter-band coupling with respect to the electronic band population. \n\nZoom Link: https://kth-se.zoom.us/j/67773156040 \nZoom ID: 627 5910 9592\n\nDate: Wednesday\, Feb 03\n\nTime: 5pm Stockholm time
URL:https://tqmatter.org/event/jason-haraldson/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20210126T153000
DTEND;TZID=Europe/Paris:20210126T163000
DTSTAMP:20260501T223438
CREATED:20210122T152631Z
LAST-MODIFIED:20210208T181853Z
UID:3319-1611675000-1611678600@tqmatter.org
SUMMARY:Group meeting
DESCRIPTION:Internal group meeting
URL:https://tqmatter.org/event/group-meeting-13/
CATEGORIES:Group Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20201214
DTEND;VALUE=DATE:20201217
DTSTAMP:20260501T223438
CREATED:20201030T081915Z
LAST-MODIFIED:20210208T180522Z
UID:3234-1607904000-1608163199@tqmatter.org
SUMMARY:Conference on Dynamic Quantum Matter and Materials
DESCRIPTION:DQMM 2020 – Virtual Conference\nfrom Jacksonville\, Florida\, USA\nHosted by UNF\, UCONN\, and NORDITA\n\n\n\n\nDynamic Quantum Matter and Materials\n\n\n\n\n\n\n\n\n\n\nDecember 14th – 16th\, 2020 \n\n\n\n\nQuantum matter and materials\, like topological states\, 2D materials\, and Dirac and Weyl materials has grown to be an active area of modern condensed matter. Fascinating properties of quantum materials might lead to technological applications such as spintronics\, quantum technologies and quantum sensors. Combination of new materials discoveries and development of new probes of quantum matter has helped shape these topics into an exciting area. Recent dynamic and pumped probe experiments reveal a strong promise of Dynamic Quantum Matter as a new research direction. We strive to measure\, understand and predict transient correlations and coherences in quantum materials upon different driving conditions. Therefore\, we introduce it as a new topic of this year’s quantum matter conference. We seek to have an active discussion on hidden\, entangled and dynamic orders that emerge in quantum materials and matter. \nMain focus for this upcoming conference will be on the modeling and experimental observations of Dynamic Quantum Matter and Materials (DQMM). Overall\, the goal of this workshop is to bring together researchers to discuss and highlight emerging topics and develop ideas for future research.
URL:https://tqmatter.org/event/conference-on-dynamic-quantum-matter-and-materials/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20201208T160000
DTEND;TZID=UTC:20201208T170000
DTSTAMP:20260501T223438
CREATED:20201130T162324Z
LAST-MODIFIED:20201130T162324Z
UID:3303-1607443200-1607446800@tqmatter.org
SUMMARY:Peter Litttlewood -  Dynamical phase transitions at many body exceptional point 
DESCRIPTION:Seminar  – Peter Litttlewood –  Dynamical phase transitions at many body exceptional point\n  \n\nZoom Link: https://kth-se.zoom.us/j/67773156040 \nZoom ID: 677 7315 6040\n\nDate: Tuesday Dec 8\n\nTime: 4pm Stockholm time\nAbstract:\nMichel Fruchart\, Ryo Hanai\, Peter Littlewood\, and Vincenzo Vitelli \nSpontaneous synchronization is at the core of many natural phenomena. Your heartbeat is maintained because cells contract in a synchronous wave; some bird species synchronize their motion into flocks; quantum synchronization is responsible for laser action and superconductivity. The transition to synchrony\, or between states of different patterns of synchrony\, is a dynamical phase transition that has much in common with conventional phase transitions of state – for example solid to liquid\, or magnetism – but the striking feature of driven dynamical systems is that the components are “active”. Consequently quantum systems with dissipation and decay are described by non-Hermitian Hamiltonians\, and active matter can abandon Newton’s third law and have non-reciprocal interactions. This substantially changes the character of many-degree-of-freedom dynamical phase transitions and the critical phenomena in their vicinity\, since the critical point is an “exceptional point” where eigenvalues become degenerate and eigenvectors coalesce. We will illustrate this in several different systems – a Bose-Einstein condensate of polaritons\, models of multicomponent active matter such as flocks of birds\, generalised Kuramoto models\, and others. We argue that there is a systematic theory\, generalized phase diagram\, and corresponding universality classes for these dynamical systems.\n\n\n\nFruchart et al.\, arXiv:2003.13176 \nHanai et al.\, 10.1103/PhysRevLett.122.185301
URL:https://tqmatter.org/event/peter-litttlewood-dynamical-phase-transitions-at-many-body-exceptional-point/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20201130T153000
DTEND;TZID=UTC:20201130T170000
DTSTAMP:20260501T223438
CREATED:20201130T161618Z
LAST-MODIFIED:20201204T141814Z
UID:3299-1606750200-1606755600@tqmatter.org
SUMMARY:Sang Wook Cheong (Rutgers) - Trompe L'oeil Ferromagnetism
DESCRIPTION: \nSang Wook Cheong (Rutgers) – Trompe L’oeil Ferromagnetism \n\nZoom Link: kth-se.zoom.us/j/61226950287 \nZoom ID: 612 2695 0287\nDate: Monday Nov 30\nTime: 17.30 Stockholm time\nTitle: Trompe L’oeil Ferromagnetism\nAbstract: The characteristics of ferro-(ferri)magnetism with non-zero magnetization include magnetic attraction\, magnetic circular dichroism\, and magneto-optical Kerr (MOKE)\, Faraday\, and various anomalous Hall-type (Hall\, Ettingshausen\, Nernst\, and thermal Hall) effects. Non-magnetic or antiferromagnetic materials in external electric fields or other environments (called specimen constituents) can share symmetry operational similarity (SOS) with magnetization in relation to broken symmetries. These specimen constituents can be associated with non-zero magnetization and/or show ferromagnetism-like behaviors\, so we say that they exhibit Trompe L’oeil Ferromagnetism. Examples include linear magnetoelectric materials such as Cr2O3 under electric fields\, Faraday effect in chiral materials such as tellurium with current flow\, magnetic field induced by the motion of Neel- or Bloch-type ferroelectric walls\, and magneto-optical Kerr (MOKE)\, Faraday effect\, and/or anomalous Hall-type effects in certain antiferromagnets such as Cr2O3\, MnPSe3\, Mn4(Nb\,Ta)2O9\, and Mn3(Sn\,Ge\,Ga). A large number of new specimen constitutes having SOS with Magnetization will be discussed\, and require future experimental verification of their ferromagnetism-like behaviors\, and also theoretical understanding of possible microscopic mechanisms
URL:https://tqmatter.org/event/sang-wook-cheong-rutgers-trompe-loeil-ferromagnetism/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20200817
DTEND;VALUE=DATE:20200822
DTSTAMP:20260501T223438
CREATED:20200121T203738Z
LAST-MODIFIED:20200713T184819Z
UID:1641-1597622400-1598054399@tqmatter.org
SUMMARY:Asia Pacific-Nordita Meeting on Quantum Matter
DESCRIPTION:Recent exciting developments in topological matter\, newly-discovered AdS and condensed matter connections\, advances in quantum materials and machine learning applications to quantum matter open opportunities for a joint research in these directions. We will host a APCTP-Nordita one week workshop with the focus on Quantum Matter.\n\n\n\nDates: 17-21 August 2020\nLocation:  Nordita\, Roslagstullsbacken 11\, Sweden \nThe aim of the meeting is to bring together researchers working on different aspects of entanglement and dynamics in quantum matter. We aim in a collaborative effort to distill the key aspects and develop common approaches to these concepts. We expect to have few speakers from each of these fields\, with plenty of discussions in a small scale meeting with an open and interactive atmosphere. \nWhile the workshop will focus on theoretical aspects we will seek connections with  the experiments  on new probes of matter\, most prominently\, MAX iV and ESS\, that are capable of revealing a new and exciting behavior of quantum matter at the short time scale with high spatial resolution. \nQuantum materials hold a promise as an important class to expand the class of materials for sensors used in a search for Dark matter. We will have lectures dedicated to the impact QM might have on a search for Dark Matter. \nTopics\nThe workshop will cover a range of topics: \n\nEntangled and competing orders\nOdd-frequency and hidden orders\nTransient dynamics and correlations\nAdS/CFT and condensed matter connections\, strange metals\nMachine learning and quantum matter.\n\nSpeakers\nConfirmed invited speakers: \n\nY. Tanaka ( U. Nagoya)\nK. Schalm(U. Leiden)\nJ. Zaanen( U. Leiden)\nT. Deveraux (U. Stanford)\nWei Ku (U. Shanghai)\n\nProgramme\nFinal schedule to be announced soon. \nOrganizers\n\nA. Balatsky (Nordita/Uconn)\nY. K. Bang (APCTP\, Postech)\nM. Eschrig (Univ Greifswald)\nJ.Hancock (Uconn)\nSang-Jin Sin (Hanyang Univ)\nA. Krikun (Nordita).
URL:https://tqmatter.org/event/asia-pacific-nordita-meeting-on-quantum-matter/
LOCATION:NORDITA\, 11 Roslagstullsbacken\, Stockholm\, Sweden
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200728T153000
DTEND;TZID=UTC:20200728T163000
DTSTAMP:20260501T223438
CREATED:20200727T145252Z
LAST-MODIFIED:20200727T145252Z
UID:2716-1595950200-1595953800@tqmatter.org
SUMMARY:[Group Meeting]
DESCRIPTION:Details to be sent out internally.
URL:https://tqmatter.org/event/group-meeting-12/
CATEGORIES:Group Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20200714T040000
DTEND;TZID=UTC:20200714T170000
DTSTAMP:20260501T223438
CREATED:20200713T185830Z
LAST-MODIFIED:20200713T185932Z
UID:2610-1594699200-1594746000@tqmatter.org
SUMMARY:Demitry Farfurnik (University of Maryland) - Coherence of Quantum Dots
DESCRIPTION:Speaker: Demitry Farfurnik (University of Maryland)\n(https://scholar.google.com/citations?user=ebOgrf0AAAAJ&hl=en)\n\nLocation and time:  Online @ 4pm Stockholm time\n\nZoom Link: https://kth-se.zoom.us/j/61809414846\nMeeting ID: 618 0941 4846\nAbstract: \n\n\nSelf-assembled Quantum Dots (QD) exhibit some of the best single photon emission properties\, including nearly ideal efficiency and indistinguishability. As such\, and considering their compatibility with nanofabrication techniques\, on-chip integration of QDs as single photon emitters and non-linear components plays a key role in integrated photonic-based information processing and may pave the way toward the creation of quantum networks. Manipulating and storing quantum information utilizing QD spins\, however\, is limited by their short coherence times originating from interactions with a nuclear bath. In this talk\, I will describe our approaches for addressing this challenge: First\, the application of dynamical decoupling (DD) pulse sequences prolongs the coherence times by decoupling the QD spins from the environment. While the performance of such protocols is often limited by the accumulation of pulse imperfections\, arbitrary spin control enabling composite and concatenated sequencing could further enhance the achievable spin control fidelities [1]. Such a sequencing is implementable by driving a Lambda system of the QD utilizing an optical signal arbitrarily modulated by a temperature-stabilized electro optical modulator (EOM). I will present a recent experimental demonstration of such a control [2]\, our analysis for optimizing the EOM working point for enhancing the achievable optical rotation Rabi frequencies\, as well as the efficiency of the protocol for QDs strongly coupled to L3 photonic crystal cavities. Second\, the resulting coherence properties may be further enhanced by utilizing molecules of coupled QDs (QDM)\, which offer a singlet-triplet ground state decoherence-free subspace [3]. Beyond the promising combination of such a subspace with the application of DD sequences\, leveraging the isolated optical transitions of the QDM may offer single-shot spin readout capabilities. I will present our approach for implementing such a spin readout incorporating microwave pi-pulses\, its experimental feasibility utilizing optimally designed transmission lines\, and the expected readout fidelities based on the achievable microwave Rabi frequencies [4]. \n[1] D. Farfurnik et al.\, “Optimizing a dynamical decoupling protocol for solid-state electronic spin ensembles in diamond’’\, Phys. Rev. B 92\, 060301(R) (2015)\n[2] J.H. Bodey et al.\, “Optical spin locking of a solid-state qubit’’\, npj Quantum Information 5\, 95 (2019)\n[3] D. Kim et al.\, “Ultrafast optical control of entanglement between two quantum-dot spins’’\, Nat. Phys. 7\, 223–229 (2011)\n[4] D. Farfurnik et al.\, “Experimental realization of time-dependent phase-modulated continuous dynamical decoupling’’\, Phys. Rev. A 96\, 013850 (2017)
URL:https://tqmatter.org/event/demitry-farfurnik-university-of-maryland-coherence-of-quantum-dots/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200512T160000
DTEND;TZID=Europe/Stockholm:20200512T170000
DTSTAMP:20260501T223438
CREATED:20200506T091653Z
LAST-MODIFIED:20200713T184819Z
UID:1758-1589299200-1589302800@tqmatter.org
SUMMARY:Michele Ceriotti - Symmetry\, locality and long-range interactions in atomistic machine learning
DESCRIPTION:Symmetry\, locality and long-range interactions in atomistic machine learning\n================================================= \nMachine learning models are proving to be extremely effective in\npredicting the properties of atomistic configurations of matter\,\ncircumventing the need for time consuming electronic structure\ncalculations. The most succesful schemes achieve transferability\nby means of a local representation of structures\, in which the\nproblem of predicting a property is broken down into the prediction\nof local\, atom-centred contributions\, and fundamental symmetries\nare incorporated exactly. This approach is however not efficient\nin describing long-range interatomic forces\, such as those arising\ndue to electrostatics.\nI will present a possible solution to this conundrum based on the\nlong-distance equivariant (LODE) framework\, that combines a local\ndescription of matter with the appropriate\, long-range asymptotic\nbehaviour of interactions.  \n=================================================\n \nZoom Login \nJoin Zoom Meeting\nhttps://stockholmuniversity.zoom.us/j/67379248617 \nMeeting ID: 673 7924 8617\nOne tap mobile\n+16699006833\,\,67379248617# US (San Jose)\n+12532158782\,\,67379248617# US (Tacoma) \nDial by your location\n+1 669 900 6833 US (San Jose)\n+1 253 215 8782 US (Tacoma)\n+1 301 715 8592 US (Germantown)\n+1 312 626 6799 US (Chicago)\n+1 346 248 7799 US (Houston)\n+1 408 638 0968 US (San Jose)\n+1 408 652 8184 US (San Jose)\n+1 646 876 9923 US (New York)\nMeeting ID: 673 7924 8617\nFind your local number: https://stockholmuniversity.zoom.us/u/cbvOSpXxkD
URL:https://tqmatter.org/event/michele-ceriotti-symmetry-locality-and-long-range-interactions-in-atomistic-machine-learning/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200428T160000
DTEND;TZID=Europe/Stockholm:20200428T170000
DTSTAMP:20260501T223438
CREATED:20200427T090448Z
LAST-MODIFIED:20200713T184819Z
UID:1756-1588089600-1588093200@tqmatter.org
SUMMARY:Paul McClarty(Max Planck Institute for the Physics of Complex Systems) -  Topological Magnons.
DESCRIPTION:Date: Tuesday 28th April\nTime: 4pm\n\nOnline via Zoom – stockholmuniversity.zoom.us/j/67021163168 (Meeting ID: 670 2116 3168)\n\nTitle: Topological Magnons\n\nAbstract: I give an overview of the insights we and other people have had into the band topology of magnons and discuss in some detail three main topics from our work: (i) Neutron scattering intensity around magnon touching points\, (ii) the non-Hermitian topology of spontaneous magnon decay and (iii) connections to experiment.\n\nPreprint – Dirac magnons. Paper “Non-Hermitian topology of spontaneous magnon decay”. \n1904.02160 https://arxiv.org/abs/1904.02160
URL:https://tqmatter.org/event/paul-mcclartymax-planck-institute-for-the-physics-of-complex-systems-topological-magnons/
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200428T153000
DTEND;TZID=Europe/Stockholm:20200428T160000
DTSTAMP:20260501T223438
CREATED:20200427T090516Z
LAST-MODIFIED:20200713T184819Z
UID:1757-1588087800-1588089600@tqmatter.org
SUMMARY:[Group Meeting]
DESCRIPTION:
URL:https://tqmatter.org/event/group-meeting-11/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200423T170000
DTEND;TZID=Europe/Stockholm:20200423T180000
DTSTAMP:20260501T223438
CREATED:20200414T073523Z
LAST-MODIFIED:20200713T184819Z
UID:1684-1587661200-1587664800@tqmatter.org
SUMMARY:[AlbaNova Colloquium] Ian Affleck - TBA
DESCRIPTION:Details TBA
URL:https://tqmatter.org/event/albanova-colloquium-ian-affleck-tba/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200414T153000
DTEND;TZID=Europe/Stockholm:20200414T170000
DTSTAMP:20260501T223438
CREATED:20200414T073406Z
LAST-MODIFIED:20200713T184819Z
UID:1682-1586878200-1586883600@tqmatter.org
SUMMARY:Group Meeting
DESCRIPTION:
URL:https://tqmatter.org/event/group-meeting-10/
CATEGORIES:Group Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200407T153000
DTEND;TZID=Europe/Stockholm:20200407T170000
DTSTAMP:20260501T223438
CREATED:20200407T070435Z
LAST-MODIFIED:20200713T184819Z
UID:1672-1586273400-1586278800@tqmatter.org
SUMMARY:Group Meeting
DESCRIPTION:  \n\nZoom details:\nTopic: Group Meeting\nTime: Apr 7\, 2020 03:30 PM StockholmJoin Zoom Meeting\nhttps://zoom.us/j/318117311?pwd=bU1nSFJTV1JnYTBpTjBvYW1nZEg1QT09 \nMeeting ID: 318 117 311\nPassword: dirac \n\n\nSchedule:\n\nAdmin matters\nDavid Carvalho – An Update/Discussion about the group website\nSumantha Bandyopadhyay – Informal research talk on non-Hermitian quantum systems.\n\n\n\n 
URL:https://tqmatter.org/event/group-meeting-9/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200331T153000
DTEND;TZID=Europe/Stockholm:20200331T170000
DTSTAMP:20260501T223438
CREATED:20200331T070248Z
LAST-MODIFIED:20200713T184819Z
UID:1669-1585668600-1585674000@tqmatter.org
SUMMARY:Group Meeting
DESCRIPTION:Via Zoom meeting. \nTopic: Group Meeting\nTime: This is a recurring meeting Meet anytime \nJoin Zoom Meeting\nhttps://zoom.us/j/646429220?pwd=TVMrUklreXkzYUMxM3lReUZaUWREUT09 \nMeeting ID: 646 429 220
URL:https://tqmatter.org/event/group-meeting-8/
CATEGORIES:Group Meetings
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200212T080000
DTEND;TZID=Europe/Stockholm:20200216T170000
DTSTAMP:20260501T223438
CREATED:20200130T085231Z
LAST-MODIFIED:20200713T184819Z
UID:1656-1581494400-1581872400@tqmatter.org
SUMMARY:HERO Retreat & Meeting '20
DESCRIPTION:Location: TBC\, Switzerland\nDate: 12-16th February\nOrganizers: Alexander Balatsky\, \nSchedule TBA
URL:https://tqmatter.org/event/hero-retreat-meeting-20/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200211T150000
DTEND;TZID=Europe/Stockholm:20200211T163000
DTSTAMP:20260501T223438
CREATED:20200124T173956Z
LAST-MODIFIED:20200713T184819Z
UID:1645-1581433200-1581438600@tqmatter.org
SUMMARY:[Group Meeting] Long Liang
DESCRIPTION:Talk by Long Liang (Nordita). Details TBH
URL:https://tqmatter.org/event/group-meeting-long-liang/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200210T160000
DTEND;TZID=Europe/Stockholm:20200210T163000
DTSTAMP:20260501T223438
CREATED:20200209T123653Z
LAST-MODIFIED:20200713T184819Z
UID:1661-1581350400-1581352200@tqmatter.org
SUMMARY:Long Liang -  Weyl semimetals in torsional spacetime
DESCRIPTION:Title: Weyl semimetals in torsional spacetime\n\n\n\n\nAbstract: Weyl semimetals necessarily break the time-reversal or/and inversion symmetry. In the presence of spatially varying time-reversal or inversion symmetry breaking fields\, we show that the Weyl fermions live in emergent torsional spacetime [1\,2]. This allows us to fabricate interface between type I and type II Weyl semimetals [1]\, which is analogous to the black hole horizon. Torsion also contributes to the chiral anomaly [3]\, and this leads to a thermal magnetotorsional effect\, which means that magnetization gradients perpendicular to the Weyl node separation give rise to temperature gradients depending only on the local positions of the Weyl nodes [2].  This effect could be observed in magnetic Weyl semimetal EuCd2As2 [4].\n\n\n\n\n\nReferences:\n[1] Long Liang and Teemu Ojanen\, Phys. Rev. Research 1\, 032006(R)(2019).\n[2] Long Liang and Teemu Ojanen\, arXiv: 1912.07732.\n[3] J. Nissinen and G.E. Volovik\, arXiv: 1909.08936; Ze-Min Huang\, Bo Han\, and Michael Stone\, arXiv: 1911.00174.\n[4] Lin-Lin Wang et al.\, Phys. Rev. B 99\, 245147 (2019); J.-Z. Ma et al.\,  Sci. Adv. 5 \, 4718 (2019); J.-R. Soh et al.\, Phys. Rev. B 100\, 201102(R) (2019).\n\n\n 
URL:https://tqmatter.org/event/long-liang-weyl-semimetals-in-torsional-spacetime/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200210T130000
DTEND;TZID=Europe/Stockholm:20200210T170000
DTSTAMP:20260501T223438
CREATED:20200209T123809Z
LAST-MODIFIED:20200713T184819Z
UID:1663-1581339600-1581354000@tqmatter.org
SUMMARY:Andrea Amoretti - A hydrodynamical description for transport in the strange metal phase of cuprates
DESCRIPTION:  \n\nTitle: A hydrodynamical description for transport in the strange metal phase of cuprates\n Speaker: Andrea Amoretti (Genova)\n\nThe talk is on Monday 10 February 2020\, 13:15\, room 132:028 (Nordita East). \n\nAbstract: High temperature superconductors are strongly coupled systems which present a complicated phase diagram with many coexisting phases. This makes it difficult to understand the mechanism which generates their singular transport properties. Hydrodynamics\, which mostly relies on the symmetries of the system without referring to any specific microscopic mechanism\, constitutes a promising framework to analyze these materials. In this talk I will show that in the strange metal phase of the cuprates\, a whole set of transport coefficients are described by a universal hydrodynamic framework. We corroborate our theoretical prediction by measuring the DC transport properties of Bi-2201 close to optimal doping\, proving the validity of our approach. Our argument can be used as a consistency check to understand the universality class governing the behavior of high temperature cuprate superconductors\n\n 
URL:https://tqmatter.org/event/andrea-amoretti-a-hydrodynamical-description-for-transport-in-the-strange-metal-phase-of-cuprates/
LOCATION:NORDITA\, 11 Roslagstullsbacken\, Stockholm\, Sweden
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Stockholm:20200204T110000
DTEND;TZID=Europe/Stockholm:20200204T120000
DTSTAMP:20260501T223438
CREATED:20200204T093650Z
LAST-MODIFIED:20200713T184819Z
UID:1658-1580814000-1580817600@tqmatter.org
SUMMARY:Danny Thonig - Ultrafast magnetism from ab-initio atomistic magnetisation dynamics
DESCRIPTION:Speaker: Danny Thonig (Örebro Universitet) \nTitle: Ultrafast magnetism from ab-initio atomistic magnetisation dynamics \nTime: Fika 10:30-11:00 \, Seminar 11:00-12:00\, \nPlace: Nordita South\, room 112:028 . \nAbstract:\nWriting and retrieving information in a magnetic material at high speed and with lower energy consumption has become an intense research field in solid state physics\, since there is growing benefits for our society and within technical applications. For instance\, by using all-optical control of magnetism\, local magnetic moments can achieve remarkably fast switching times. The pioneering work by Beaurepaire et al. [1] demonstrated dynamics on a pico second time-scale. The experiment of Ref. [1] used a high-intensity laser pulse that pumped the sample\, and after a time-delay\, a second laser pulse was used to probe its magnetic state\, via the magneto-optical effect. All hitherto proposed mechanisms of ultrafast magnetism (e.g. Refs. [2] and [3]) have been criticized\, for not being consistent with observations and/or for not being physically relevant (reviewed e.g. in Ref.[4]). The most pressing\, open questions connected to these experiments concerns the transfer of angular momentum.\nTo describe ultrafast magnetism from first-principles\, we used atomistic magnetisation dynamics combined with density functional theory. The latter serves to calculate fundamental magnetic properties\, magnetic interaction\, and energy dissipation contributions.\nWe applied this machinery naturally to a wide range of materials\, as recently also to Heusler and inverse Heusler materials. We studied demagnetisation and remagnetisation behaviour for different structural phases of Heusler’s and compared our results to experimental measurements with qualitative good agreement. \n[1] E. Beaurepaire et al.\, Phys. Rev. Lett. 76\, 4250 (1996).\n[2] B. Koopmans et al.\, J. Magn. and Magn. Mater. 286\, 271 (2005).\n[3] M. Battiato et al.\, Phys. Rev. Lett. 105\, 027203 (2010).\n[4] O. Eriksson\, A.Bergman\, L.Bergqvist and J.Hellsvik\, Atomistic Spin-Dynamics\, fundamentals and applications (Oxford university press\, 2017).
URL:https://tqmatter.org/event/danny-thonig-ultrafast-magnetism-from-ab-initio-atomistic-magnetisation-dynamics/
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DTSTART;TZID=Europe/Stockholm:20200204T103000
DTEND;TZID=Europe/Stockholm:20200204T120000
DTSTAMP:20260501T223438
CREATED:20200130T085020Z
LAST-MODIFIED:20200713T184820Z
UID:1654-1580812200-1580817600@tqmatter.org
SUMMARY:[CMT] Danny Thonig ( Örebro University)
DESCRIPTION:Abstract TBA
URL:https://tqmatter.org/event/cmt-danny-thonig-orebro-university/
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