Does Hawking effect always degrade fidelity of quantum teleportation in Schwarzschild spacetime?

2023/04/03 by Shumin Wu, Wu, Shu-Min, Xiaowei Fan +9 · 15 citations
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Mechanical and Optical Resonators #Quantum Electrodynamics and Casimir Effect #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2304.00984

openalex publication_date 2023/04/03 · openalex created_date 2023/04/06 · openalex updated_date 2026/07/28

Abstract

Previous studies have shown that the Hawking effect always destroys quantum correlations and the fidelity of quantum teleportation in the Schwarzschild black hole. Here, we investigate the fidelity of quantum teleportation of Dirac fields between users in Schwarzschild spacetime. We find that, with the increase of the Hawking temperature, the fidelity of quantum teleportation can monotonically increase, monotonically decrease, or non-monotonically increase, depending on the choice of the initial state, which means that the Hawking effect can create net fidelity of quantum teleportation. This striking result banishes the extended belief that the Hawking effect of the black hole can only destroy the fidelity of quantum teleportation. We also find that quantum steering cannot fully guarantee the fidelity of quantum teleportation in Schwarzschild spacetime. This new unexpected source may provide a new idea for the experimental evidence of the Hawking effect.

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