Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Moitra, Upamanyu"'
Autor:
Moitra, Upamanyu
We consider trajectories of massless particles in the presence of charged black holes in asymptotically AdS spacetimes in arbitrary dimensions. We study the properties of the photon ring in the (near-)extremal limit and show that the photon ring can
Externí odkaz:
http://arxiv.org/abs/2408.08308
Autor:
Dabholkar, Atish, Moitra, Upamanyu
We construct $\mathbb{Z}_N$ orbifolds of the ten-dimensional heterotic string theories appropriate for implementing the stringy replica method for the calculation of quantum entanglement entropy. A novel feature for the heterotic string is that the g
Externí odkaz:
http://arxiv.org/abs/2407.17553
Autor:
Dabholkar, Atish, Moitra, Upamanyu
Publikováno v:
JHEP 06 (2024) 053
We compute the exact one-loop partition function of $\mathbb{Z}_N$ orbifolds of Euclidean BTZ black hole with the aim to compute the entanglement entropy of the black hole horizon in string theory as a function of the mass and spin of the black hole
Externí odkaz:
http://arxiv.org/abs/2312.14253
Autor:
Dabholkar, Atish, Moitra, Upamanyu
Publikováno v:
JHEP 06 (2024) 209
We consider $\mathbb{Z}_N$ orbifolds of Type-II compactifications to four and six dimensions on several Calabi-Yau manifolds in the orbifold limit with the aim to compute the entanglement entropy. The spectrum can contain tachyons in the doubly-twist
Externí odkaz:
http://arxiv.org/abs/2310.13735
Autor:
Dabholkar, Atish, Moitra, Upamanyu
Publikováno v:
Phys.Rev.D 109 (2024) 12, L12190 (Letter)
We analyze the one-loop quantum entanglement entropy in ten-dimensional Type-II string theory using the orbifold method by analytically continuing in $N$ the genus-one partition function for string orbifolds on $\mathbb{R}^2/\mathbb{Z}_N$ conical spa
Externí odkaz:
http://arxiv.org/abs/2306.00990
Autor:
Moitra, Upamanyu
Publikováno v:
Phys. Rev. D 109 (2024) L041903 (Letter)
We study (near-)circular orbits of charged particles in the background of charged black holes in asymptotically Anti-de Sitter (AdS) spacetimes of arbitrary dimensionality. We calculate the energy and angular momentum of such particles in a large-rad
Externí odkaz:
http://arxiv.org/abs/2305.08907
Autor:
Jatkar, Dileep P., Moitra, Upamanyu
Publikováno v:
Prog Theor Exp Phys (2023)
We revisit the Dirac-Born-Infeld--like boundary counter-term for four dimensional theory of gravity. We show that it correctly executes complete background subtraction for both asymptotically AdS and asymptotically flat geometries. With an appropriat
Externí odkaz:
http://arxiv.org/abs/2212.12545
Autor:
Moitra, Upamanyu
Publikováno v:
JHEP 06 (2023) 194
We initiate a systematic study of continuously self-similar (CSS) gravitational dynamics in two dimensions, motivated by critical phenomena observed in higher dimensional gravitational theories. We consider CSS spacetimes admitting a homothetic Killi
Externí odkaz:
http://arxiv.org/abs/2211.01394
We discuss JT gravity in AdS and dS space in the second order formalism. For the pure dS JT theory without matter, we show that the path integral gives rise in general to the Hartle-Hawking wave function which describes an arbitrary number of disconn
Externí odkaz:
http://arxiv.org/abs/2202.03130
We formulate the path integral for Jackiw-Teitelboim gravity in the second order formalism working directly with the metric and the dilaton. We consider the theory both in Anti-de Sitter(AdS) and de Sitter space(dS) and analyze the path integral for
Externí odkaz:
http://arxiv.org/abs/2101.00596