Effect of back reaction on entanglement and subregion volume complexity in strongly coupled plasma

Chakrabortty, Shankhadeep; Pant, Sanjay; Sil, Karunava

doi:10.1007/jhep06(2020)061

Cited by 19 publications

(23 citation statements)

References 49 publications

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“…The above proposals pass a variety of consistency checks which provide important pieces of evidence for finding holographic duals of EWCS. See [13][14][15][16][17][18][19][20] for various studies of general properties of EWCS and its holographic counterparts in static geometries. Further, the nonequilibrium evolution of EWCS for various quench protocols has been considered in [21][22][23][24][25][26].…”

Section: Jhep08(2021)038mentioning

confidence: 99%

Entanglement wedge cross section in holographic excited states

Sahraei

Vasli

Mozaffar

et al. 2021

J. High Energ. Phys.

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We evaluate the entanglement wedge cross section (EWCS) in asymptotically AdS geometries which are dual to boundary excited states. We carry out a perturbative analysis for calculating EWCS between the vacuum and other states for a symmetric configuration consisting of two disjoint strips and obtain analytical results in the specific regimes of the parameter space. In particular, when the states described by purely gravitational excitations in the bulk we find that the leading correction to EWCS is negative and hence the correlation between the boundary subregions decreases. We also study other types of excitations upon adding the extra matter fields including current and scalar condensate. Our study reveals some generic properties of boundary information measures dual to EWCS, e.g., entanglement of purification, logarithmic negativity and reflected entropy. Finally, we discuss how these results are consistent with the behavior of other correlation measures including the holographic mutual information.

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Section: Jhep08(2021)038mentioning

confidence: 99%

Entanglement wedge cross section in holographic excited states

Sahraei

Vasli

Mozaffar

et al. 2021

J. High Energ. Phys.

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“…In future, it will be interesting to repeat the same exercise for the gravity dual of N = 4 SYM theory which is deformed by the presence of external heavy quarks [97,98]. Further in [99], the author has studied the dynamics of entanglement wedge cross section in shockwave geometry for three dimensional AdS geometry.…”

Section: Discussionmentioning

confidence: 99%

Quantum information scrambling and quantum chaos in little string theory

Mahish,

Sil

2022

Preprint

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In the current manuscript we perform a systematic investigation about the effects of nonlocal interaction to the spread of quantum information in many body system. In particular, we have studied how nonlocality influence the existing bound on the growth rate of the commutator involving two local operators, the butterfly velocity. For this purpose, we consider the nonlocal theory on the worldvolume of N 1, NS5 branes arising in the limit of vanishing string coupling, the 'little string theory'. A direct evidence of nonlocality can be realized from the 'volume law' behavior for the most dominant part of holographic entanglement entropy. We obtain the butterfly velocity by studying the dynamics of the near horizon geometry backreacted by a high energy quanta in the form of a shockwave resulting from an early perturbation on the corresponding thermofield double state. We observe that the butterfly velocity increases with the nonlocal scale of little string theory, the inverse Hagedorn temperature β h , indicating a faster rate of information spread due to the nonlocal interaction. The same conclusion follows as the disruption of two sided mutual information is observed to occur at a faster rate for higher values of β h . Finally, we realize a direct connection between the parameters of quantum chaos and the quasinormal modes for collective excitations through the phenomenon of 'pole skipping'.

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“…(A.2) 6 Also see [58] for the study of different entanglement measures on the same back reacted background. 7 We find the lecture as given in [59] very useful in computing the gauge invariant variable in our case.…”

Section: A Construction Of the Gauge Invariant Variablementioning

confidence: 99%

Pole skipping and chaos in anisotropic plasma: a holographic study

Sil

2021

J. High Energ. Phys.

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Recently, a direct signature of chaos in many body system has been realized from the energy density retarded Green’s function using the phenomenon of ‘pole skipping’. Moreover, special locations in the complex frequency and momentum plane are found, known as the pole skipping points such that the retarded Green’s function can not be defined uniquely there. In this paper, we compute the correction/shift to the pole skipping points due to a spatial anisotropy in a holographic system by performing near horizon analysis of EOMs involving different bulk field perturbations, namely the scalar, the axion and the metric field. For vector and scalar modes of metric perturbations we construct the gauge invariant variable in order to obtain the master equation. Two separate cases for every bulk field EOMs is considered with the fluctuation propagating parallel and perpendicular to the direction of anisotropy. We compute the dispersion relation for momentum diffusion along the transverse direction in the shear channel and show that it passes through the first three successive pole skipping points. The pole skipping phenomenon in the sound channel is found to occur in the upper half plane such that the parameters Lyapunov exponent λL and the butterfly velocity vB are explicitly obtained thus establishing the connection with many body chaos.

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Effect of back reaction on entanglement and subregion volume complexity in strongly coupled plasma

Cited by 19 publications

References 49 publications

Entanglement wedge cross section in holographic excited states

Entanglement wedge cross section in holographic excited states

Quantum information scrambling and quantum chaos in little string theory

Pole skipping and chaos in anisotropic plasma: a holographic study

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