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Gauging anomalous unitary operators
Yuhan Liu, Hassan Shapourian, Paolo Glorioso +1
Boundary theories of static bulk topological phases of matter are obstructed in the sense that they cannot be realized on their own as isolated systems. The obstruction can be quan…
Anyonic Partial Transpose I: Quantum Information Aspects
Hassan Shapourian, Roger S. K. Mong, Shinsei Ryu
A basic diagnostic of entanglement in mixed quantum states is known as the partial transpose and the corresponding entanglement measure is called the logarithmic negativity. Despit…
Topological Field Theory of Non-Hermitian Systems
Kohei Kawabata, Ken Shiozaki, Shinsei Ryu
Non-Hermiticity gives rise to unique topological phases without Hermitian analogs. However, the effective field theory has yet to be established. Here, we develop a field-theoretic…
The quasi-particle picture and its breakdown after local quenches: mutual information, negativity, and reflected entropy
Jonah Kudler-Flam, Yuya Kusuki, Shinsei Ryu
We study the dynamics of (Rényi) mutual information, logarithmic negativity, and (Rényi) reflected entropy after exciting the ground state by a local operator. Together with recent…
Transport across twist angle domains in moiré graphene
Bikash Padhi, Apoorv Tiwari, Titus Neupert +1
Many of the experiments in twisted bilayer graphene (TBG) differ from each other in terms of the details of their phase diagrams. Few controllable aspects aside, this discrepancy i…
Nonunitary Scaling Theory of Non-Hermitian Localization
Kohei Kawabata, Shinsei Ryu
Non-Hermiticity can destroy Anderson localization and lead to delocalization even in one dimension. However, the unified understanding of the non-Hermitian delocalization has yet t…