Group meeting
Internal group meeting
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 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 […]
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 searches for exotic physics signals with networks of quantum sensors. Most of my work is related to atomic clocks and I will give a general […]
June 6 (arrival day) - 10, 2023 At 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 . Note that on Saturday, June 10, all the activities will be in building 3 (Nordita), floor 6, Mega […]
Workshop Overview: The 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, […]
Workshop Overview: The 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. The topics up for discussion include: […]