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Entanglement entropy of mixed state in thermal CFT2

Xin Jiang*, Haitang Yang†, and Zilin Zhao‡

  • *Contact author: domoki@stu.scu.edu.cn
  • †Contact author: hyanga@scu.edu.cn
  • ‡Contact author: zhaozilin@stu.scu.edu.cn
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Phys. Rev. D 112, 046025 – Published 28 August, 2025

DOI: https://doi.org/10.1103/bpzx-kdgq

Abstract

Using the subtraction approach, we give the bipartite mixed state entanglement entropy in thermal conformal field theory2. With these entanglement entropies, we examine in detail the holographic duals of different entangling configurations unambiguously. In the thermofield double state, we show an horizon-crossing feature in two-sided entanglement configuration.

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Phys. Rev. D 112, 046025– Published 28 August, 2025
  • Received 4 June 2025
  • Accepted 15 August 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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