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arXiv · 2010.15759

Entanglement Entropy for $T \bar T$, $J \bar T$, $T \bar J$ deformed holographic CFT

Soumangsu Chakraborty·Akikazu Hashimoto
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Abstract

We derive the geodesic equation for determining the Ryu-Takayanagi surface in $AdS_3$ deformed by single trace $\mu T \bar T + \varepsilon_+ J \bar T + \varepsilon_- T \bar J$ deformation for generic values of $(\mu, \varepsilon_+, \varepsilon_-)$ for which the background is free of singularities. For generic values of $\varepsilon_\pm$, Lorentz invariance is broken, and the Ryu-Takayanagi surface embeds non-trivially in time as well as spatial coordinates. We solve the geodesic equation and characterize the UV and IR behavior of the entanglement entropy and the Casini-Huerta $c$-function. We comment on various features of these observables in the $(\mu, \varepsilon_+, \varepsilon_-)$ parameter space. We discuss the matching at leading order in small $(\mu, \varepsilon_+, \varepsilon_-)$ expansion of the entanglement entropy between the single trace deformed holographic system and a class of double trace deformed theories where a strictly field theoretic analysis is possible. We also comment on expectation value of a large rectangular Wilson loop-like observable.

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Soumangsu Chakraborty, Akikazu Hashimoto. 2020-10-29. Entanglement Entropy for $T \bar T$, $J \bar T$, $T \bar J$ deformed holographic CFT. https://doi.org/10.1007/jhep02(2021)096

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