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Role of quantum degrees of freedom of relativistic fields in quantum information protocols

T. Rick Perche* and Eduardo Martín-Martínez†

  • Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1; Perimeter Institute for Theoretical Physics, Waterloo, Ontario, Canada N2L 2Y5; and Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

  • *trickperche@perimeterinstitute.ca
  • †emartinmartinez@uwaterloo.ca
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Phys. Rev. A 107, 042612 – Published 14 April, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.042612

Abstract

We analyze the differences between relativistic fields with or without quantum degrees of freedom in relativistic quantum information protocols. We classify the regimes where the existence of quantum degrees of freedom is necessary to explain the phenomenology of interacting quantum systems. We also identify the precise regimes where quantum fields can be well approximated by quantum-controlled classical fields in relativistic quantum information protocols. Our results can be useful to discern which features are fundamentally different in classical and quantum field theory.

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Outline

Information

Phys. Rev. A 107, 042612– Published 14 April, 2023
  • Received 10 January 2023
  • Revised 27 March 2023
  • Accepted 28 March 2023
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