Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Bhattacharya, Krishnakanta"'
Unlike black hole thermodynamics, the fluid-gravity correspondence of a generic null surface appears to be ``incomplete''; though both approaches point to the emergent nature of gravitation. In the existing formulation of fluid-gravity correspondence
Externí odkaz:
http://arxiv.org/abs/2411.06914
In both general relativity and Lanczos-Lovelock theories of gravity, it has been found that the Noether charge density in any bulk region of spacetime can be interpreted as the heat content of the boundary surface. In addition, it was found that the
Externí odkaz:
http://arxiv.org/abs/2409.04176
Publikováno v:
Phys. Lett. B 854 (2024) 138722
Topological arguments are currently being used as a novel scheme to discern the properties of black holes while ignoring their detailed structure and specific field equations. Among various avenues of black hole physics, where this novel approach is
Externí odkaz:
http://arxiv.org/abs/2402.18791
Publikováno v:
Phys. Rev. D 109 (2024), 064026
Boundary term and Brown-York (BY) formalism, which is based on the Hamilton-Jacobi principle, are complimentary of each other as the gravitational actions are not, usually, well-posed. In scalar-tensor theory, which is an important alternative to GR,
Externí odkaz:
http://arxiv.org/abs/2307.06674
Out of several possible extensions of general relativity, the scalar-tensor theory is the most popular for several reasons. Since the quantum description of gravity is yet to be formulated properly, the understanding of a gravitational theory remains
Externí odkaz:
http://arxiv.org/abs/2209.07050
Autor:
Bhattacharya, Krishnakanta
Publikováno v:
Gen. Rel. Grav. 54, 81 (2022)
The Einstein-Hilbert (EH) action is peculiar in many ways. Some of the Peculiar features have already been highlighted in literature. In the present article, we have discussed some peculiar features of EH action which has not been discussed earlier.
Externí odkaz:
http://arxiv.org/abs/2207.08199
Autor:
Bhattacharya, Krishnakanta
Publikováno v:
Nuclear Physics B 989 (2023) 116130
In the extended phase space approach, one can define thermodynamic pressure and volume that gives rise to the van der Waals type phase transition for black holes. For Einstein's GR, the expressions of these quantities are unanimously accepted. Of lat
Externí odkaz:
http://arxiv.org/abs/2112.00938
Autor:
Bagla, Jasjeet Singh, Bhattacharya, Krishnakanta, Chakraborty, Sumanta, Engineer, Sunu, Faraoni, Valerio, Kolekar, Sanved, Kothawala, Dawood, Lochan, Kinjalk, Modak, Sujoy, Nair, V. Parameswaran, Paranjape, Aseem, Parattu, Krishnamohan, Rajeev, Sarada G., Majhi, Bibhas Ranjan, Choudhury, Tirthankar Roy, Sami, Mohammad, Sarkar, Sudipta, Sengupta, Sandipan, Seshadri, T. R., Shankaranarayanan, S., Singh, Suprit, Singh, Tejinder P., Sriramkumar, L., Yajnik, Urjit
Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning forty-two years, he published more than three hundred research articles, w
Externí odkaz:
http://arxiv.org/abs/2110.03208
Publikováno v:
Phys.Rev.D 104 (2021) 12, 124038
We show that the equation of motion of scalar-tensor theory acquires thermodynamic identity when projected on a generic null surface. The relevant projection is given by $E_{ab}l^ak^b$, where $E_{ab} =8\pi T_{ab}^{(m)}$ represents the equation motion
Externí odkaz:
http://arxiv.org/abs/2105.07787
Publikováno v:
JHEP07(2020)018
The duality of gravitational dynamics (projected on a null hypersurface) and of fluid dynamics is investigated for the scalar tensor (ST) theory of gravity. The description of ST gravity, in both Einstein and Jordan frames, is analyzed from fluid-gra
Externí odkaz:
http://arxiv.org/abs/2002.04743