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arXiv · 2602.22994

CFT derivation of entanglement phase transition in pseudo entropy

Hiroki Kanda·Tadashi Takayanagi·Zixia Wei
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Abstract

In this paper, we discuss the entanglement phase transition of pseudo entropy in CFTs. We focus on the case where the in-state and the out-state are different boundary states related by boundary condition changing operators. We compute the pseudo entropy with BCFT methods and find a phase transition with respect to the conformal weight of the boundary condition changing operators. For holographic CFTs, we confirm that the CFT results match that evaluated in AdS.

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Hiroki Kanda, Tadashi Takayanagi, Zixia Wei. 2026-02-26. CFT derivation of entanglement phase transition in pseudo entropy. https://arxiv.org/abs/2602.22994

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