10 citations · 35 across the 14 of their papers we have counts for
7 papers · 1 filter
Necessary conditions for causality from linearized stability at ultra-high boosts
Shuvayu Roy, Sukanya Mitra, Rajeev Singh
In this work, we provide a novel method to constrain the causal parameter space of a relativistic hydrodynamic system exclusively from its linear stability analysis at non-zero mom…
Relativistic Dispersion Spectra across Lorentz boosted frames: Spurious modes and the enigma of causality
Sayantani Bhattacharyya, Sukanya Mitra, Shuvayu Roy +1
The analysis of excitation spectra in gradient-expanded relativistic fluid theories frequently leads to pathologies under Lorentz boosts. However, extracting the dispersion modes i…
Iyer-Wald ambiguities and gauge covariance of Entropy current in Higher derivative theories of gravity
Alokananda Kar, Prateksh Dhivakar, Shuvayu Roy +2
In [arXiv:2105.06455, arXiv:2206.04538], the authors have been able to argue for an ultra-local version of the second law of black hole mechanics, for arbitrary diffeomorphism inva…
Causality Criteria from Stability Analysis at Ultra-High Boost
Shuvayu Roy, Sukanya Mitra
In this work, we have exclusively employed the linear stability analysis at ultra-high boost on two well-known stable-causal theories - second-order MIS and first-order BDNK, to id…
Entropy Current and Fluid-Gravity Duality in Gauss-Bonnet theory
Chandranathan A, Sayantani Bhattacharyya, Milan Patra +1
Working within the approximation of small amplitude expansion, recently an entropy current has been constructed on the horizons of dynamical black hole solution in any higher deriv…
Reparametrization Symmetry of Local Entropy Production on a Dynamical Horizon
Sayantani Bhattacharyya, Pooja Jethwani, Milan Patra +1
Recently, it has been shown that for a dynamical black hole in any higher derivative theory of gravity, one could construct a spatial entropy current, characterizing the in/outflow…
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…