Nonperturbative analysis of entanglement harvesting from coherent field states

Petar Simidzija and Eduardo Martín-Martínez
Phys. Rev. D 96, 065008 – Published 14 September 2017

Abstract

We study (nonperturbatively) the interactions of delta-coupled detectors with coherent states of a scalar field. We show that the time-evolved density matrix spectra of (i) a single detector, (ii) two detectors, and (iii) the partial transpose of the latter, are all independent of which coherent state the field was in. Furthermore, we find that the eigenvalues in (iii) are non-negative, implying that a delta-coupled detector pair cannot harvest entanglement from the vacuum, or any other coherent field state.

  • Received 4 July 2017

DOI:https://doi.org/10.1103/PhysRevD.96.065008

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyParticles & Fields

Authors & Affiliations

Petar Simidzija1,2 and Eduardo Martín-Martínez1,2,3

  • 1Department of Applied Mathematics, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • 2Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • 3Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5, Canada

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Issue

Vol. 96, Iss. 6 — 15 September 2017

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