Correlation functions in the D1-D5 orbifold CFT

Tormo, Joan Garcia i; Taylor, Marika

doi:10.48550/arxiv.1804.10205

Cited by 2 publications

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“…It is conjectured that we can move to an 'orbifold point' where this CFT is a particularly simple sigma model [17]. For many nice results using the D1D5 CFT at the 'orbifold point' see [17,18,19,20,21,22,23,24,25]. We will begin in the Euclidean theory at this orbifold point.…”

Section: The Orbifold Cftmentioning

confidence: 99%

Thermalization in the D1D5 CFT

Hampton,

Mathur

2019

Preprint

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It is generally agreed that black hole formation in gravity corresponds to thermalization in the dual CFT. It is sometimes argued that if the CFT evolution shows evidence of large redshift in gravity, then we have seen black hole formation in the CFT. We argue that this is not the case: a clock falling towards the horizon increases its redshift but remains intact as a clock; thus it is not 'thermalized'. Instead, thermalization should correspond to a new phase after the phase of large redshift, where the infalling object turns into fuzzballs on reaching within planck distance of the horizon. We compute simple examples of the scattering vertex in the D1D5 CFT which, after many iterations, would lead to thermalization. An initial state made of two left-moving and two right-moving excitations corresponds, in gravity, to two gravitons heading towards each other. The thermalization vertex in the CFT breaks these excitations into multiple excitations on the left and right sides; we compute the amplitudes for several of these processes. We find secular terms that grow as t 2 instead of oscillating with t; we conjecture that this may be a feature of processes leading to thermalization.

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Section: The Orbifold Cftmentioning

confidence: 99%

Thermalization in the D1D5 CFT

Hampton,

Mathur

2019

Preprint

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“…The D1D5 system has proved extremely useful in studying microscopic features of black holes such as the counting of black hole microstates [25], reproducing greybody factors in Hawking radiation [26]. Much about microstate geometries can be learned from the the D1D5 CFT at the orbifold point where the theory is free [27,28,29,30,31,32,33,34,35]. However, if one wants to understand dynamical processes in supergravity, such as tidal effects and the scrambling of probes one must turn on an interaction in the CFT [36,37,38,39].…”

Section: Introductionmentioning

confidence: 99%

The Dual of a Tidal Force in the D1D5 CFT

Guo¹,

Hampton²

2021

Preprint

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It was demonstrated that a string probe falling radially within a superstratum geometry would experience tidal forces. These tidal forces were shown to excite the string by converting its kinetic energy into stringy excitations. Using the AdS/CFT correspondence we seek to understand this behavior from the perspective of the dual D1D5 CFT. To study this process we turn on an interaction of the theory which is described by a deformation operator. We start with an initial state which is dual to a graviton probe moving within the superstratum geometry. We then use two deformation operators to compute transition amplitudes between this state and a final state that corresponds to stringy excitations. We show that this amplitude grows as t 2 with t being the amount of time for which the deformation operators are turned on. We argue that this process in the CFT is suggestive of the tidal effects experienced by the probe propagating within the dual superstratum geometry.

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Correlation functions in the D1-D5 orbifold CFT

Cited by 2 publications

References 0 publications

Thermalization in the D1D5 CFT

Thermalization in the D1D5 CFT

The Dual of a Tidal Force in the D1D5 CFT

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