57 citations · 392 across the 29 of their papers we have counts for
29 papers
Null reduction and dynamical realization of Carrollian conformal symmetries
Ashis Saha, Rabin Banerjee, Sunandan Gangopadhyay
We start from a Lorentzian action in a deformed light-cone background and applying the method of null reduction leads to a Carrollian action in one lower spacetime dimensions. We a…
Holographic Brownian dynamics of a heavy particle in a boosted thermal plasma background
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
In this work, we have performed a detailed holographic analysis of the stochastic dynamics of a heavy particle propagating through a strongly coupled plasma moving with a constant…
Gauge interactions and the Galilean limit
Ashis Saha, Rabin Banerjee, Sunandan Gangopadhyay
The gauge invariant minimal couplings for a class of relativistic free matter fields with global symmetry (related to usual charge conservation) have been obtained by incorporating…
Effect of non-conformal deformation on the gapped quasi-normal modes and the holographic implications
Ashis Saha, Sunandan Gangopadhyay
The spectral curve of quasinormal modes for a massive real scalar field in the background of a non-conformal black brane geometry has been obtained by utilizing a Frobenius type ne…
Investigating the role of mutual information in the Page curve for a functional renormalization group improved Schwarzschild black hole
Ashis Saha, Anirban Roy Chowdhury, Sunandan Gangopadhyay
The present work delves into probing the importance of mutual information of relevant subsystems in obtaining the correct time-evolution of fine-grained entropy of Hawking radiatio…
A holographic realization of correlation and mutual information
Ashis Saha, Anirban Roy Chowdhury, Sunandan Gangopadhyay
The status of the inequality existing between mutual information and (normalized) thermal two-point connected correlation function, namely, $I(A:B)\ge\frac{(\expval{\mathcal{O}_{A}…
Information theoretic measures for Lifshitz system
Souvik Paul, Anirban Roy Chowdhury, Ashis Saha +1
In this work, we have studied various mixed state information theoretic quantities for an excited state of Lifshitz spacetime in -dimensions. This geometry is the gravity dual…
Gauss-Bonnet AdS planar and spherical black hole thermodynamics and holography
Souvik Paul, Sunandan Gangopadhyay, Ashis Saha
In this work, we extend the study in \href{https://link.springer.com/article/10.1007/JHEP11(2022)013}{JHEP11(2022)013} incorporating the AdS/CFT duality to establish a relationship…
Quantum chaos in the presence of non-conformality
Ashis Saha, Sunandan Gangopadhyay
The behaviour of a chaotic system and its effect on existing quantum correlation has been holographically studied in presence of non-conformality. Keeping in mind the gauge/gravity…
Mixed state entanglement measures for the dipole deformed supersymmetric Yang-Mills theory
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
Two different entanglement measures for mixed states, namely, the entanglement of purification and entanglement negativity has been holographically computed for the dipole deformed…
Mutual information of subsystems and the Page curve for Schwarzschild de-Sitter black hole
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
In this work, we show that the two proposals associated to the mutual information of matter fields can be given for an eternal Schwarzschild black hole in de-Sitter spacetime. Thes…
Signatures of quantum geometry from exponential corrections to the black hole entropy
Soham Sen, Ashis Saha, Sunandan Gangopadhyay
It has been recently shown in [Phys. Rev. Lett. 125 (2020) 041302] that microstate counting carried out for quantum states residing on the horizon of a black hole leads to a correc…
Born-Infeld corrections to holographic transport coefficients with spatially modulated chemical potential
Ankur Srivastav, Sunandan Gangopadhyay, Ashis Saha
In this work, we have analytically computed the holographic transport coefficients for (2 + 1)- dimensional strongly coupled field theories, placed in a spatially modulated chemica…
The role of mutual information in the Page curve
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
In this work, we give two proposals regarding the status of connectivity of entanglement wedges and the associated saturation of mutual information. The first proposal has been giv…
Shadow of Kottler black hole in the presence of plasma for a co-moving observer
Anish Das, Ashis Saha, Sunandan Gangopadhyay
We consider a spherically symmetric black hole metric in (3+1)-dimensions in presence of a positive cosmological constant . We use a general approach as proposed in \cite{1} to…
Mixed state information theoretic measures in boosted black brane
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
In this paper, we study various mixed state information theoretic quantities for a boosted black brane geometry. We have considered two setups, namely, a strip-like subsystem taken…
Study of circular geodesics and shadow of rotating charged black hole surrounded by perfect fluid dark matter immersed in plasma
Anish Das, Ashis Saha, Sunandan Gangopadhyay
In this work, we consider a rotating charged black hole surrounded by perfect fluid dark matter. We consider the system to be immersed in non-magnetised, pressureless plasma. First…
Mutual information, islands in black holes and the Page curve
Ashis Saha, Sunandan Gangopadhyay, Jyoti Prasad Saha
The role played by the mutual information of subsystems on the Page curve is explored in this paper. With the total system consisting of the black hole and radiation, together with…
Entanglement wedge cross section for noncommutative Yang-Mills theory
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
The signature of noncommutativity on various measures of entanglement has been observed by considering the holographic dual of noncommutative super Yang-Mills theory. We have follo…
Entropy function from the Einstein boundary term
Anirban Roy Chowdhury, Ashis Saha, Sunandan Gangopadhyay
We show using the entropy function formalism developed by Sen \cite{Sen:2005wa} that the boundary term which arises from the Einstein-Hilbert action is sufficient to yield the Beke…
Holographic study of entanglement and complexity for mixed states
Ashis Saha, Sunandan Gangopadhyay
In this paper, we holographically quantify the entanglement and complexity for mixed states by following the prescription of purification. The bulk theory we consider in this work…
Investigation of circular geodesics in a rotating charged black hole in the presence of perfect fluid dark matter
Anish Das, Ashis Saha, Sunandan Gangopadhyay
In this work we have obtained a charged black hole solution in the presence of perfect fluid dark matter (PFDM) and discuss its energy conditions. The metric corresponding to the r…
Universal Pieces of Holographic Entanglement Entropy and Holographic Subregion Complexity
Sunandan Gangopadhyay, Dharmesh Jain, Ashis Saha
We propose that the definition of holographic subregion complexity (HSC) needs a slight modification for supergravity solutions with warped anti-de Sitter (AdS) factors. Such warp…
Generalized entanglement temperature and entanglement Smarr relation
Ashis Saha, Sunandan Gangopadhyay, Jyoti Prasad Saha
We observe that in presence of excitation, a thermodynamic Smarr like relation corresponding to a generalized entanglement temperature () can be holographically obtained for t…