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Your search keyword '"Roy, Shubho R."' showing total 2 results
Start Over Author "Roy, Shubho R." Topic quantum field theory Publication Year Range Last 50 years
2 results on '"Roy, Shubho R."'

1. Hologram of a pure state black hole.

Author

Roy, Shubho R. and Sarkar, Debajyoti

Subjects
*HOLOGRAPHY, *BLACK holes, *QUANTUM field theory
Abstract

In this paper, we extend the Hamilton-Kabat-Lifschytz-Lowe (HKLL) holographic smearing function method to reconstruct (quasi)local anti-de Sitter bulk scalar observables in the background of a large anti-de Sitter black hole formed by null shell collapse (a "pure state" black hole), from the dual conformal field theory which is undergoing a sudden quench. In particular, we probe the near horizon and subhorizon bulk locality. First, we construct local bulk operators from the conformal field theory in the leading semiclassical limit, N → ∞. Then, we look at effects due to the finiteness of N, where we propose a suitable coarsegraining prescription involving early and late time cutoffs to define semiclassical bulk observables which are approximately local, their departure from locality being nonperturbatively small in N. Our results have important implications on the black hole information problem. [ABSTRACT FROM AUTHOR]

Published
2015
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2. Holographic complexity of LST and single trace TT¯.

Author

Chakraborty, Soumangsu, Katoch, Gaurav, and Roy, Shubho R.

Subjects
*QUANTUM field theory, *STRING theory, *COMPUTATIONAL complexity, *COMPLEXITY (Philosophy), *TEMPERATURE effect
Abstract

In this work, we continue our study of string theory in the background that interpolates between AdS3 in the IR to flat spacetime with a linear dilaton in the UV. The boundary dual theory interpolates between a CFT2 in the IR to a certain two-dimensional Little String Theory (LST) in the UV. In particular, we study computational complexity of such a theory through the lens of holography and investigate the signature of non-locality in the short distance behavior of complexity. When the cutoff UV scale is much smaller than the non-locality (Hagedorn) scale, we find exotic quadratic and logarithmic divergences (for both volume and action complexity) which are not expected in a local quantum field theory. We also generalize our computation to include the effects of finite temperature. Up to second order in finite temperature correction, we do not any find newer exotic UV-divergences compared to the zero temperature case. [ABSTRACT FROM AUTHOR]

Published
2021
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