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Non-local order parameters for states with topological electromagnetic response
Thomas Klein Kvorning, Christian Spånslätt, AtMa P. O. Chan +1
Chern insulators are states of matter characterized by a quantized Hall conductance, gapless edge modes but also a singular response to monopole configurations of an external elect…
Particle Number Fluctuations, Rényi and Symmetry-resolved Entanglement Entropy in Two-dimensional Fermi Gas from Multi-dimensional Bosonization
Mao Tian Tan, Shinsei Ryu
In this paper, we revisit the computation of particle number fluctuations and the Rényi entanglement entropy of a two-dimensional Fermi gas using multi-dimensional bosonization. In…
Conformal field theory and the web of quantum chaos diagnostics
Jonah Kudler-Flam, Laimei Nie, Shinsei Ryu
We study three prominent diagnostics of chaos and scrambling in the context of two-dimensional conformal field theory: the spectral form factor, out-of-time-ordered correlators, an…
Collective excitations at filling factor 5/2: The view from superspace
Andrey Gromov, Emil J. Martinec, Shinsei Ryu
We present a microscopic theory of the neutral collective modes supported by the non-Abelian fractional quantum Hall states at filling factor 5/2. The theory is formulated in terms…
Effective response theory for Floquet topological systems
Paolo Glorioso, Andrey Gromov, Shinsei Ryu
We present an effective field theory approach to the topological response of Floquet systems with symmetry group . This is achieved by introducing a background gauge field i…
Entanglement spectrum and entropy in topological non-Hermitian systems and non-unitary conformal field theories
Po-Yao Chang, Jhih-Shih You, Xueda Wen +1
We propose a method of computing and studying entanglement quantities in non-Hermitian systems by use of a biorthogonal basis. We find that the entanglement spectrum characterizes…