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arXiv · 2610.17239

Holographic Pseudo Entropy from the Rindler Method in AdS and Flat Space

Mehdi Hakami Shalamzari·Zahra Paygozar·Mahdi Kord Zangeneh
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Abstract

Via the Rindler method, we study holographic timelike entanglement entropy (TEE) for a general timelike interval in AdS$_3$/CFT$_2$ and flat$_3$/CCFT$_2$. The TEE is the pseudo entropy of a timelike interval. In the bulk, the imaginary part of the TEE comes from a timelike geodesic, but in the Rindler picture this geodesic has not been identified. After a Rindler transformation to a rotating BTZ black hole, the two spacelike extremal curves lie on the inner and outer horizons, and exchanging $l_u\leftrightarrow \ell l_ϕ$ takes one to the other. We find the geometric meaning of the timelike extremal curve: a geodesic stretched between the two horizons. Its length, $iπ\ell$, is independent of the interval, and it alone produces the imaginary part $iπc/6$. We follow the same procedure in flat space holography, where the spacelike curve sits on the cosmological horizon and the timelike curve lies between the cosmological horizon and timelike infinity. Evaluating the holographic TEE for a timelike interval in CCFT$_2$ on the plane, we find that, in contrast with the cylinder, the real and imaginary parts are equal.

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Mehdi Hakami Shalamzari, Zahra Paygozar, Mahdi Kord Zangeneh. 2026-10-12. Holographic Pseudo Entropy from the Rindler Method in AdS and Flat Space. https://arxiv.org/abs/2610.17239

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