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2022

Black Holes Decohere Quantum Superpositions

Danielson, Daine L., Satishchandran, Gautam, Wald, Robert M.

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We show that if a massive body is put in a quantum superposition of spatially separated states, the mere presence of a black hole in the vicinity of the body will eventually destroy the coherence of the superposition.

This occurs because, in effect, the gravitational field of the body radiates soft gravitons into the black hole, allowing the black hole to acquire "which path" information about the superposition.
A similar effect occurs for quantum superpositions of electrically charged bodies.
We provide estimates of the decoherence time for such quantum superpositions.

Black Holes Decohere Quantum Superpositions · Around

Built on

G. Satishchandran and R.M. Wald, Asymptotic behavior of massless fields and the memory effect , Phys. Rev. D 99
Original
1901
Earlier work this paper cites.
E.T. Copson and E.T. Whittaker, On electrostatics in a gravitational field , Proceedings of the Royal Society of London. Series A 118
1928
Earlier work this paper cites.
J.M. Cohen and R.M. Wald, Point charge in the vicinity of a schwarzschild black hole , Journal of Mathematical Physics 12
1971
Earlier work this paper cites.
B. Linet, Electrostatics and magnetostatics in the schwarzschild metric , Journal of Physics A, General Physics 9
1976
Earlier work this paper cites.

Similar

B.S. Kay and R.M. Wald, Theorems on the Uniqueness and Thermal Properties of Stationary, Nonsingular, Quasifree States on Space-Times with a Bifurcate Killing Horizon , Phys. Rept. 207
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W.G. Unruh and R.M. Wald, Information Loss , Rept. Prog. Phys. 80
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W.G. Unruh, False loss of coherence , arXiv:1110.2199
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K. Prabhu, G. Satishchandran and R.M. Wald, Infrared Finite Scattering Theory in Quantum Field Theory and Quantum Gravity , arXiv:2203.14334
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Then

D. Marolf, The Black Hole information problem: past, present, and future , Rept. Prog. Phys. 80
Original
2017
Later among the works it cites.
A. Belenchia, R.M. Wald, F. Giacomini, E. Castro-Ruiz, v. Brukner and M. Aspelmeyer, Quantum Superposition of Massive Objects and the Quantization of Gravity , Phys. Rev. D 98
Original
2018
Later among the works it cites.
D.L. Danielson, G. Satishchandran and R.M. Wald, Gravitationally mediated entanglement: Newtonian field versus gravitons , Phys. Rev. D 105
Original
2022
Closest in time.

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