Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Roy, Pratim"'
We extend the method of Simpson and Visser (SV) of regularising a black hole spacetime, to cases where the initial metric represents a globally naked singularity. We choose two particular geometries, the Janis-Newman-Winicour (JNW) metric representin
Externí odkaz:
http://arxiv.org/abs/2206.11764
Autor:
Roy, Pratim
In recent years, various aspects of theoretical models with long range interactions have attracted attention, ranging from out-of-time-ordered correlators to entanglement. In the present paper, entanglement properties of a simple non-local model with
Externí odkaz:
http://arxiv.org/abs/2112.13641
Autor:
Auzzi, Roberto, Baiguera, Stefano, Legramandi, Andrea, Nardelli, Giuseppe, Roy, Pratim, Zenoni, Nicolo
We analytically compute subsystem action complexity for a segment in the BTZ black hole background up to the finite term, and we find that it is equal to the sum of a linearly divergent term proportional to the size of the subregion and of a term pro
Externí odkaz:
http://arxiv.org/abs/1910.00526
Autor:
Mahapatra, Subhash, Roy, Pratim
Publikováno v:
JHEP 1811 (2018) 138
We study the holographic "complexity=action'" (CA) and "complexity=volume" (CV) proposals in Einstein-dilaton gravity in all spacetime dimensions. We analytically construct an infinite family of black hole solutions and use CA and CV proposals to inv
Externí odkaz:
http://arxiv.org/abs/1808.09917
Autor:
Roy, Pratim, Sarkar, Tapobrata
Publikováno v:
Phys. Rev. D 97, 086018 (2018)
We investigate subregion holographic complexity in the context of renormalization group flow geometries. We use both the Poinca\'re slicing and the Janus ansatz as holographic duals to renormalization group flows in the boundary conformal field theor
Externí odkaz:
http://arxiv.org/abs/1708.05313
Autor:
Roy, Pratim, Sarkar, Tapobrata
Publikováno v:
Phys. Rev. D 96, 026022 (2017)
The volume inside a Ryu-Takayanagi surface has been conjectured to be related to the complexity of subregions of the boundary field theory. Here, we study the behaviour of this volume analytically, when the entangling surface has a strip geometry. We
Externí odkaz:
http://arxiv.org/abs/1701.05489
We perform a detailed analysis of holographic entanglement R\'enyi entropy in some modified theories of gravity with four dimensional conformal field theory duals. First, we construct perturbative black hole solutions in a recently proposed model of
Externí odkaz:
http://arxiv.org/abs/1609.02290
We study information theoretic geometry in time dependent quantum mechanical systems. First, we discuss global properties of the parameter manifold for two level systems exemplified by i) Rabi oscillations and ii) quenching dynamics of the XY spin ch
Externí odkaz:
http://arxiv.org/abs/1605.01358
In the context of extended phase space thermodynamics and the AdS-CFT correspondence, we consider the chemical potential ($\mu$) dual to the number of colours ($N$) of the boundary gauge theory, in the grand canonical ensemble. By appropriately defin
Externí odkaz:
http://arxiv.org/abs/1512.05541
The end stage of a gravitational collapse process can generically result in a black hole or a naked singularity. Here we undertake a comparative analysis of the nature of tidal forces in these backgrounds. The effect of such forces is generically exe
Externí odkaz:
http://arxiv.org/abs/1504.01302