Enhanced quantum teleportation in the background of Schwarzschild spacetime by weak measurements

  • Xing Xiao
  • Yao Yao
  • Yan-Ling LiEmail author
  • Ying-Mao XieEmail author
Regular Article


It is commonly believed that the fidelity of quantum teleportation in the gravitational field would be degraded due to the heating up by the Hawking radiation. In this paper, we point out that the Hawking effect could be eliminated by the combined action of pre- and post-weak measurements, and thus, the teleportation fidelity is almost completely protected. It is intriguing to notice that the enhancement of fidelity could not be attributed to the improvement of entanglement, but rather to the probabilistic nature of weak measurements. Our work extends the ability of weak measurements as a quantum technique to battle against gravitational decoherence in relativistic quantum information.



This work is supported by the Funds of the National Natural Science Foundation of China under Grant Nos. 11665004, 11605166, 61765007, and 11365011, and supported by Scientific Research Foundation of Jiangxi Provincial Education Department under Grants Nos. GJJ150996 and GJJ150682. YL Li is supported by the Program of Qingjiang Excellent Young Talents, Jiangxi University of Science and Technology.


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Copyright information

© Società Italiana di Fisica (SIF) and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  1. 1.College of Physics and Electronic InformationGannan Normal UniversityGanzhouChina
  2. 2.Microsystems and Terahertz Research CenterChina Academy of Engineering PhysicsChengduChina
  3. 3.School of Information EngineeringJiangxi University of Science and TechnologyGanzhouPeople’s Republic of China

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