Barzanjeh, Shabir, Pirandola, Stefano orcid.org/0000-0001-6165-5615, Vitali, David et al. (1 more author) (2020) Microwave quantum illumination using a digital receiver. Science Advances. eabb0451. ISSN 2375-2548
Abstract
Quantum illumination is a powerful sensing technique that employs entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. The promised advantage over classical strategies is particularly evident at low signal powers, a feature which could make the protocol an ideal prototype for non-invasive biomedical scanning or low-power short-range radar. In this work we experimentally investigate the concept of quantum illumination at microwave frequencies. We generate entangled fields using a Josephson parametric converter to illuminate a room-temperature object at a distance of 1 meter in a free-space detection setup. We implement a digital phase conjugate receiver based on linear quadrature measurements that outperforms a symmetric classical noise radar in the same conditions despite the entanglement-breaking signal path. Starting from experimental data, we also simulate the case of perfect idler photon number detection, which results in a quantum advantage compared to the relative classical benchmark. Our results highlight the opportunities and challenges on the way towards a first room-temperature application of microwave quantum circuits.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Computer Science (York) |
Depositing User: | Pure (York) |
Date Deposited: | 19 May 2020 12:40 |
Last Modified: | 16 Oct 2024 16:37 |
Published Version: | https://doi.org/10.1126/sciadv.abb0451 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1126/sciadv.abb0451 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:160957 |