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Non-invertible anomalies and Topological orders
It has been realized that anomalies can be classified by topological phases in one higher dimension. Previous studies focus on ’t Hooft anomalies of a theory with a global symmetry...
Nov 19, 2019
Floquet quantum criticality
It has recently been shown that quenched randomness, via the phenomenon of many-body localization, can stabilize dynamical phases of matter in periodically driven (Floquet) systems, with one example being discrete...
Nov 21, 2019
Revivals imply quantum many-body scars
We derive general results relating revivals in the dynamics of quantum many-body systems to the entanglement properties of energy eigenstates. For a D-dimensional lattice system of N sites initialized in...
Nov 22, 2019
Modeling the pseudogap state in cuprates: quantum disordered pair density wave
I will briefly review the pseudogap phenomenology in high Tc cuprate superconductor, especially the recent experiments, and propose a unified picture of the phenomenology under only one assumption: the fluctuating...
Nov 25, 2019
Condensed Matter Seminar
Condensed Matter Seminar
Jan 01, 2019
Reinforcement Learning assisted Quantum Optimization
We propose a reinforcement learning (RL) scheme for feedback quantum control within the quantum approximate optimization algorithm (QAOA). QAOA requires a variational minimization for states constructed by applying a sequence...
Jun 05, 2020
Engineering and measuring higher-order topology
Recently, a lot of attention has been dedicated to a novel class of topological systems, called higher-order topological insulators (TIs). The reason is that, while a conventional d-dimensional TI exhibits...
Jun 09, 2020
Emergent criticality in non-unitary random dynamics
In this talk, I will discuss emergent criticality in non-unitary random quantum dynamics. More specifically, I will focus on a class of free fermion random circuit models in one spatial...
Jun 16, 2020
Controlled access to the low-energy physics of critical Fermi surfaces
Condensed matter physics is the study of the complex behaviour of a large number of interacting particles such that their collective behaviour gives rise to emergent properties. We will discuss...
Jul 13, 2020
Physical footprints of intrinsic sign problems
The sign problem is a widespread numerical hurdle preventing us from simulating the equilibrium behaviour of many interesting models, most notably the Hubbard model. Research aimed at solving the sign...
Jul 21, 2020