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. Dates: 17-21 August 2020 Location: Nordita, Roslagstullsbacken 11, Sweden […]
Sang Wook Cheong (Rutgers) - Trompe L'oeil FerromagnetismZoom Link: kth-se.zoom.us/j/61226950287 Zoom ID: 612 2695 0287Date: Monday Nov 30Time: 17.30 Stockholm timeTitle: Trompe L'oeil FerromagnetismAbstract: 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 […]
Seminar - Peter Litttlewood - Dynamical phase transitions at many body exceptional point Zoom Link: https://kth-se.zoom.us/j/67773156040 Zoom ID: 677 7315 6040 Date: Tuesday Dec 8 Time: 4pm Stockholm time Abstract: Michel Fruchart, Ryo Hanai, Peter Littlewood, and Vincenzo Vitelli Spontaneous synchronization is at the core of many natural phenomena. Your heartbeat is maintained because cells […]
DQMM 2020 - Virtual Conference from Jacksonville, Florida, USA Hosted by UNF, UCONN, and NORDITA Dynamic Quantum Matter and Materials December 14th – 16th, 2020 Quantum 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 […]
Internal group meeting
Examining multi-band effects on the electronic compressibility of a 2D electron gas: Insights into the negative compressibility of LAO/STO In 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 […]
Internal Group Meeting
Beyond BCS: An Exact Model for Superconductivity and MottnessHigh-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 […]
Spectral bulk-boundary correspondence of odd-frequency Cooper pairs Surface 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 . This fact might […]
Direct detection of odd-frequency superconductivity Odd-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 […]
Kekule spiral order in twisted bilayer graphene Twisted bilayer graphene has attracted a lot of attention due to the presence of correlated insulators proximate to superconductivity. In this talk I […]
Searches for dark matter and exotic astrophysics with networks of quantum sensors. As precision quantum sensors become ubiquitous, it is natural to combine them into networks. I will focus on […]
Theoretical Quantum Matter