Schwinger effect of a relativistic boson entangled with a qubit

Yujie Li, Qingqing Mao, and Yu Shi
Phys. Rev. A 99, 032340 – Published 25 March 2019

Abstract

We use the concept of quantum entanglement to analyze the Schwinger effect on an entangled state of a qubit and a boson mode coupled with the electric field. As a consequence of the Schwinger production of particle-antiparticle pairs, the electric field decreases both the correlation and the entanglement between the qubit and the particle mode. This work exposes a profound difference between bosons and fermions. In the boson case, entanglement between the qubit and the antiparticle mode cannot be caused by the Schwinger effect on the preexisting entanglement between the qubit and the particle mode, though correlation can. In the fermion case, both can.

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  • Received 2 January 2019

DOI:https://doi.org/10.1103/PhysRevA.99.032340

©2019 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyParticles & Fields

Authors & Affiliations

Yujie Li1, Qingqing Mao1, and Yu Shi1,2,*

  • 1Department of Physics & State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
  • 2Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China

  • *yushi@fudan.edu.cn

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Issue

Vol. 99, Iss. 3 — March 2019

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