Making two particle detectors in flat spacetime communicate quantumly

Lapponi, Alessio; Louko, Jorma; Mancini, Stefano

Abstract

A communication protocol with nonzero quantum capacity is found when the two communicating parts are particle detector models in (3+1)-dimensional spacetime. In particular, as detectors, we consider two harmonic oscillators interacting with a scalar field, whose evolution is generalized for whatever background spacetime and whatever spacetime smearing of the detectors. We then specialize to Minkowski spacetime and an initial Minkowski vacuum, considering a rapid interaction between the field and the two detectors, studying the case where the receiver is static and the sender is moving. The possibility to have a quantum capacity greater than zero stems from a relative acceleration between the detectors. Indeed, no reliable quantum communication is possible when the two detectors are static or moving inertially with respect to each other, but a reliable quantum communication can be achieved between a uniformly accelerated sender and an inertial receiver.

Citation

Lapponi, A., Louko, J., & Mancini, S. (2024). Making two particle detectors in flat spacetime communicate quantumly. Physical Review D, 110(2), 025018. https://doi.org/10.1103/physrevd.110.025018

• Journal Article Type: Article
• Acceptance Date: Jun 5, 2024
• Online Publication Date: Jul 22, 2024
• Publication Date: Jul 15, 2024
• Deposit Date: Jul 25, 2024
• Publicly Available Date: Jul 25, 2024
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 110
• Issue: 2
• Article Number: 025018
• DOI: https://doi.org/10.1103/physrevd.110.025018
• Keywords: Quantum communication; Quantum field theory; Relativistic quantum information
• Public URL: https://nottingham-repository.worktribe.com/output/37600811
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.025018