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of 153
pro vyhledávání: '"Choi, Sangmin"'
Gauge theories and perturbative gravity in four dimensions are governed by a tower of infinite-dimensional symmetries which arise from tree-level soft theorems. However, aside from the leading soft theorems which are all-loop exact, subleading ones r
Externí odkaz:
http://arxiv.org/abs/2403.13053
Autor:
Choi, Sangmin, Larsen, Finn
We discuss AdS$_2$ quantum gravity from an unconventional perspective that emphasizes bulk geometry. In our approach, AdS$_2$ has no boundary, there are no divergences that require renormalization, and the dilaton of JT-gravity can be omitted altoget
Externí odkaz:
http://arxiv.org/abs/2302.13917
We construct the standard and dual supertranslation charges on the future horizon of the Schwarzschild black hole, using the first-order formulation of gravity with the Holst action. The Dirac bracket algebra of standard and dual supertranslation cha
Externí odkaz:
http://arxiv.org/abs/2212.00170
Publikováno v:
Phys.Rev.Lett. 129 (2022) 22, 221603
We investigate the standard and dual Bondi-Metzner-Sachs (BMS) supertranslation generators on a black hole horizon and draw some conclusions about black hole physics. Recently, it has been shown that in addition to conventional BMS supertranslation s
Externí odkaz:
http://arxiv.org/abs/2205.07923
Autor:
Choi, Sangmin, Larsen, Finn
We review and extend recent progress on the quantum description of near-extremal black holes in the language of effective quantum field theory. With black holes in Einstein-Maxwell theory as the main example, we derive the Schwarzian low energy descr
Externí odkaz:
http://arxiv.org/abs/2108.04028
Autor:
Choi, Sangmin, Akhoury, Ratindranath
Publikováno v:
Phys. Rev. D 102, 025001 (2020)
We construct the Faddeev-Kulish asymptotic states in a quantum field theory of electric and magnetic charges. We find that there are two kind of dressings: apart from the well known (electric) Wilson line dressing, there is a magnetic counterpart whi
Externí odkaz:
http://arxiv.org/abs/1912.02224
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We demonstrate within the quantum field theoretical framework that an asymptotic particle falling into the black hole implants soft graviton hair on the horizon, conforming with the classical proposal of Hawking, Perry and Strominger. A key ingredien
Externí odkaz:
http://arxiv.org/abs/1910.05882
Autor:
Choi, Sangmin, Akhoury, Ratindranath
We construct Faddeev-Kulish states in QED and perturbative quantum gravity to subleading order in the soft momentum expansion and to first order in the coupling constant, using the charge conservation formula of asymptotic symmetries associated with
Externí odkaz:
http://arxiv.org/abs/1907.05438
Autor:
Choi, Sangmin, Akhoury, Ratindranath
We develop a unified framework for the construction of soft dressings at boundaries of spacetime, such as the null infinity of Minkowski spacetime and the horizon of a Schwarzschild black hole. The construction is based on an old proposal of Mandelst
Externí odkaz:
http://arxiv.org/abs/1809.03467