276 citations · 1.6k across the 26 of their papers we have counts for
26 papers
A comparison of two constructions for dynamical corrections to Wald entropy
Sayantani Bhattacharyya, Parthajit Biswas, Nilay Kundu
In this work, we analyze the differences and similarities between two recent constructions, which are distinct in their methodologies for extending the Wald entropy of stationary b…
A classical Bousso bound for higher derivative corrections to general relativity
Sayantani Bhattacharyya, Parthajit Biswas, Nilay Kundu
Focussing on theories for which the higher derivative terms are considered as small corrections in the Lagrangian to Einstein's two-derivative theory of general relativity (GR), we…
Inflationary non-Gaussianities in alpha vacua and consistency with conformal symmetries
Arhum Ansari, Pinak Banerjee, Prateksh Dhivakar +2
We study the conformal invariance of inflationary non-Gaussianities associated with scalar fluctuations in a non-Bunch-Davies initial state, known as the -vacuum, in single-fiel…
Entropy-current for dynamical black holes in Chern-Simons theories of gravity
Ishan Deo, Prateksh Dhivakar, Nilay Kundu
We construct an entropy current and establish a local version of the classical second law of thermodynamics for dynamical black holes in Chern-Simons (CS) theories of gravity. We w…
A CFT interpretation of cosmological correlation functions in vacua in de-Sitter space
Sachin Jain, Nilay Kundu, Suman Kundu +2
de-Sitter(dS) space allows for a generalized class of vacua, known as vacua, described by some parameters. The Bunch-Davies (BD) vacua is a point in this parameter space. The c…
Non-minimal coupling of scalar and gauge fields with gravity: an entropy current and linearized second law
Parthajit Biswas, Prateksh Dhivakar, Nilay Kundu
This work extends the proof of a local version of the linearized second law involving an entropy current with non-negative divergence by including the arbitrary non-minimal couplin…
The zeroth law of black hole thermodynamics in arbitrary higher derivative theories of gravity
Sayantani Bhattacharyya, Parthajit Biswas, Anirban Dinda +1
We consider diffeomorphism invariant theories of gravity with arbitrary higher derivative terms in the Lagrangian as corrections to the leading two derivative theory of Einstein's…
An entropy current and the second law in higher derivative theories of gravity
Sayantani Bhattacharyya, Prateksh Dhivakar, Anirban Dinda +3
We construct a proof of the second law of thermodynamics in an arbitrary diffeomorphism invariant theory of gravity working within the approximation of linearized dynamical fluctua…
An entropy current for dynamical black holes in four-derivative theories of gravity
Jyotirmoy Bhattacharya, Sayantani Bhattacharyya, Anirban Dinda +1
We propose an entropy current for dynamical black holes in a theory with arbitrary four derivative corrections to Einstein's gravity, linearized around a stationary black hole. The…
Path-Integral Complexity for Perturbed CFTs
Arpan Bhattacharyya, Pawel Caputa, Sumit R. Das +3
In this work, we formulate a path-integral optimization for two dimensional conformal field theories perturbed by relevant operators. We present several evidences how this optimiza…
Liouville Action as Path-Integral Complexity: From Continuous Tensor Networks to AdS/CFT
Pawel Caputa, Nilay Kundu, Masamichi Miyaji +2
We propose an optimization procedure for Euclidean path-integrals that evaluate CFT wave functionals in arbitrary dimensions. The optimization is performed by minimizing certain fu…
Anti-de Sitter Space from Optimization of Path Integrals in Conformal Field Theories
Pawel Caputa, Nilay Kundu, Masamichi Miyaji +2
We introduce a new optimization procedure for Euclidean path integrals which compute wave functionals in conformal field theories (CFTs). We optimize the background metric in the s…
Towards a second law for Lovelock theories
Sayantani Bhattacharyya, Felix M. Haehl, Nilay Kundu +2
In classical general relativity described by Einstein-Hilbert gravity, black holes behave as thermodynamic objects. In particular, the laws of black hole mechanics can be interpret…
Fundamental Flavours, Fields and Fixed Points: A Brief Account
Arnab Kundu, Nilay Kundu
In this article we report on a preliminary study, {\it via} Holography, of infrared fixed points in a putative strongly coupled SU gauge theory, with fundamental matte…
On the surface of superfluids
Jay Armas, Jyotirmoy Bhattacharya, Akash Jain +1
Developing on a recent work on localized bubbles of ordinary relativistic fluids, we study the comparatively richer leading order surface physics of relativistic superfluids, coupl…
Surface transport in plasma-balls
Jay Armas, Jyotirmoy Bhattacharya, Nilay Kundu
We study the surface transport properties of stationary localized configurations of relativistic fluids to the first two non-trivial orders in a derivative expansion. By demanding…
Exploring Lovelock theory moduli space for Schroedinger solutions
Dileep P. Jatkar, Nilay Kundu
We look for Schroedinger solutions in Lovelock gravity in . We span the entire parameter space and determine parametric relations under which the Schroedinger solution exist…
Ward Identities for Scale and Special Conformal Transformations in Inflation
Nilay Kundu, Ashish Shukla, Sandip P. Trivedi
We derive the general Ward identities for scale and special conformal transformations in theories of single field inflation. Our analysis is model independent and based on symmetry…
Constraints from Conformal Symmetry on the Three Point Scalar Correlator in Inflation
Nilay Kundu, Ashish Shukla, Sandip P. Trivedi
Using symmetry considerations, we derive Ward identities which relate the three point function of scalar perturbations produced during inflation to the scalar four point function,…
A Strongly Coupled Anisotropic Fluid From Dilaton Driven Holography
Sachin Jain, Nilay Kundu, Kallol Sen +2
We consider a system consisting of dimensional gravity with a negative cosmological constant coupled to a massless scalar, the dilaton. We construct a black brane solution whic…
Conformal Invariance and the Four Point Scalar Correlator in Slow-Roll Inflation
Archisman Ghosh, Nilay Kundu, Suvrat Raju +1
We calculate the four point correlation function for scalar perturbations in the canonical model of slow-roll inflation. We work in the leading slow-roll approximation where the ca…
Interpolating from Bianchi Attractors to Lifshitz and AdS Spacetimes
Shamit Kachru, Nilay Kundu, Arpan Saha +2
We construct classes of smooth metrics which interpolate from Bianchi attractor geometries of Types II, III, VI and IX in the IR to Lifshitz or geometries in the…
Extremal Horizons with Reduced Symmetry: Hyperscaling Violation, Stripes, and a Classification for the Homogeneous Case
Norihiro Iizuka, Shamit Kachru, Nilay Kundu +4
Classifying the zero-temperature ground states of quantum field theories with finite charge density is a very interesting problem. Via holography, this problem is mapped to the cla…
Entangled Dilaton Dyons
Nilay Kundu, Prithvi Narayan, Nilanjan Sircar +1
Einstein-Maxwell theory coupled to a dilaton is known to give rise to extremal solutions with hyperscaling violation. We study the behaviour of these solutions in the presence of a…