Entanglement in non-Hermitian quantum systems and non-unitary conformal field theories
- Date
- February 9 (Thu) at 17:00 - 18:15, 2023 (JST)
- Speaker
-
- Chang Po-Yao (Assistant Professor, Department of Physics, National Tsing Hua University, Taiwan)
- Venue
- via Webex
- Language
- English
- Host
- Chen-Hsuan Hsu (Academia Sinica, Taiwan)
Time: 5pm ~ 6:15pm (JST); 9am ~ 10:15am (CET); 4pm ~ 5:15pm (Taiwan)
Entanglement is a powerful tool to diagnose many-body quantum systems. One example is the critical system where the low energy property can be described by conformal field theories (CFTs), and the central charge which uniquely characterizes the CFT can be perfectly extracted from the entanglement entropy. However, the entanglement properties for non-unitary CFTs are not well understood. Moreover, the entanglement properties in many-body microscopic models which can be described by non-unitary CFTs have not been explored. In this talk, I would like to demonstrate several non-Hermitian systems which can be described by non-unitary CFTs, and show their entanglement properties can be correctly obtained by the proposed generic entanglement entropy.
Field: Condensed Matter Physics
Keywords: non-Hermitian systems, conformal field theory, many-body systems, entanglement entropy
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