Torsion as a Probe in Condensed Matter Systems
Taylor Hughes University of Illinois Urbana-Champaign
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Fractional Quantum Hall states Under Decoherence
Zijian Wang Tsinghua University
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Exploring Quantum Many-Body Scars: Anomalies to Thermalization in Quantum Systems
Julia Wildeboer Brookhaven National Laboratory
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Torsion as a Probe in Condensed Matter Systems
Taylor Hughes University of Illinois Urbana-Champaign
: In this talk I will review the common appearance of torsion in solids as well as some new developments. Torsion typically appears in condensed matter physics associated to topological defects known as dislocations. Now we are beginning to uncover new aspects of the coupling of torsion to materials. Recently, a dissipationless viscosity has been studied in the quantum Hall effect. I will connect this viscosity to a 2+1-d torsion Chern-Simons term and discuss possible thought experiments in which this could be measured. Additionally I will discuss a new topological defect in 3+1-d, the torsional monopole, which does not require a lattice deformation to exist. If present, torsional monopoles are likely to impact the behavior of materials with strong spin-orbit coupling such as topological insulators. -
Mutual information and the structure of entanglement in quantum field theory
Brian Swingle Brandeis University
In this talk I will describe my recent work on the structure of entanglement in field theory from the point of view of mutual information. I will give some basic scaling intuition for the entanglement entropy and then describe how this intuition is better captured by the mutual information. I will also describe a proposal for twist operators that can be used to calculate the mutual information using the replica method. Finally, I will discuss the relevance of my results for holographic duality and entanglement based simulation methods for many body systems.