Entanglement spectrum and entropy in non-Hermitian systems

ORAL

Abstract

In this talk, we study both the entanglement spectrum and the entanglement entropy by use of a biothogonal basis in non-Hermitian free fermion systems. We show the entanglement spectrum can characterize topological features in the non-Hermitian Su-Schrieffer-Heeger model with parity and time reversal symmetry. In addition, we find the entanglement entropy at the critical point of this model has a logarithmic scaling with corresponding central charge c=-2, which can be described by the non-unitary conformal field theory.

Presenters

  • Po-Yao Chang

    National Tsing Hua University Taiwan, Department of Physics, National Tsing Hua University

Authors

  • Po-Yao Chang

    National Tsing Hua University Taiwan, Department of Physics, National Tsing Hua University

  • Jhih-Shih You

    IFW Dresden

  • Xueda Wen

    Massachusetts Institute of Technology, Department of Physics, Massachusetts Institute of Technology

  • Shinsei Ryu

    University of Chicago