Quantum interferences and gates with emitter-based coherent photon sources
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Quantum emitters such as quantum dots, defects in diamond or in silicon have emerged as efficient single-photonsources that are progressively exploited in quantum technologies. In 2019, it was shown that the emitted single
photon states often include coherence with the vacuum component. Here we investigate how such photon-number
coherence alters quantum interference experiments that are routinely implemented both for characterizing or
exploiting the generated photons. We show that it strongly modifies intensity correlation measurements in a
Hong–Ou–Mandel experiment and leads to errors in indistinguishability estimations. It also results in additional
entanglement when performing partial measurements. We illustrate the impact on quantum protocols by evidenc
ing modifications in heralding efficiency and fidelity of two-qubit gates.
photon states often include coherence with the vacuum component. Here we investigate how such photon-number
coherence alters quantum interference experiments that are routinely implemented both for characterizing or
exploiting the generated photons. We show that it strongly modifies intensity correlation measurements in a
Hong–Ou–Mandel experiment and leads to errors in indistinguishability estimations. It also results in additional
entanglement when performing partial measurements. We illustrate the impact on quantum protocols by evidenc
ing modifications in heralding efficiency and fidelity of two-qubit gates.
Date Issued
2024-12-25
Date Acceptance
2024-10-08
Citation
Optica Quantum, 2024, 2 (6), pp.404-412
ISSN
2837-6714
Publisher
Optica Publishing Group
Start Page
404
End Page
412
Journal / Book Title
Optica Quantum
Volume
2
Issue
6
Copyright Statement
©2024 Optica Publishing Group Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
License URL
Subjects
Optics
PERFORMANCE
Physical Sciences
Physics
Quantum Science & Technology
Science & Technology
SINGLE PHOTONS
Publication Status
Published
Date Publish Online
2024-11-13