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Hawking Radiation from the Double Copy.

Anton Ilderton1, William Lindved1, Karthik Rajeev1

  • 1University of Edinburgh, Higgs Centre, School of Physics and Astronomy, Edinburgh, United Kingdom.

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|March 13, 2026
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Summary
This summary is machine-generated.

The double copy framework reveals Hawking radiation from particle production in gauge fields, linking gravity and gauge theory beyond perturbative scattering. This method unifies black hole spacetime descriptions, including thermal spectra and horizon dependence.

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Area of Science:

  • Theoretical Physics
  • Quantum Gravity
  • String Theory

Background:

  • The double copy relates gravity and gauge theory, primarily studied in perturbative scattering.
  • Nonperturbative aspects and extensions beyond trivial backgrounds remain less understood.
  • Black hole spacetimes and Hawking radiation are key areas in quantum gravity.

Purpose of the Study:

  • To explore nonperturbative aspects of the double copy beyond trivial backgrounds.
  • To demonstrate how Hawking radiation emerges from the double copy of particle production.
  • To unify classical and quantum double copy prescriptions for black hole spacetimes.

Main Methods:

  • Combines worldline and amplitude methods.
  • Applies the double copy to particle production in a background gauge field.
  • Analyzes emergence of Hawking radiation, thermal spectrum, and horizon dependence.

Main Results:

  • Hawking radiation, thermal spectrum, and horizon dependence emerge from the double copy of particle production in a gauge field.
  • This occurs even in the absence of a global horizon or thermal spectrum in the gauge theory side.
  • The approach successfully unifies several existing double copy prescriptions for black hole spacetimes.

Conclusions:

  • The double copy provides a powerful framework for understanding quantum gravity phenomena like Hawking radiation.
  • It offers a unified perspective on black hole physics, connecting gauge theory and gravitational aspects.
  • This work extends the applicability of the double copy to nonperturbative regimes and complex backgrounds.