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  • Letter
  • Open Access

Soft theorems in curved spacetime

Peng Cheng1,2 and Pujian Mao1

  • 1Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, 135 Yaguan Road, Tianjin 300350, China
  • 2Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, Gansu, China

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Phys. Rev. D 106, L081702 – Published 19 October, 2022

DOI: https://doi.org/10.1103/PhysRevD.106.L081702

Abstract

In this paper, we derive a soft photon theorem in the near horizon region of the Schwarzschild black hole from the Ward identity of the near horizon large gauge transformation. The flat spacetime soft photon theorem can be recovered as a limiting case of the curved spacetime. The soft photons on the horizon are indeed soft electric hairs. This accomplishes the triangle equivalence on the black hole horizon.

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References (17)

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Information

Phys. Rev. D 106, L081702– Published 19 October, 2022
  • Received 11 July 2022
  • Accepted 22 September 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

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