Shi, Haowei, Zhang, Zheshen, Pirandola, Stefano orcid.org/0000-0001-6165-5615 et al. (1 more author) (2020) Entanglement-Assisted Absorption Spectroscopy. Physical Review Letters. 180502. ISSN 1079-7114
Abstract
Spectroscopy is an important tool for probing the properties of materials, chemicals and biological samples. We design a practical transmitter-receiver system that exploits entanglement to achieve a provable quantum advantage over all spectroscopic schemes based on classical sources. To probe the absorption spectra, modelled as pattern of transmissivities among different frequency modes, we employ broad-band signal-idler pairs in two-mode squeezed vacuum states. At the receiver side, we apply photodetection after optical parametric amplification. Finally, we perform a maximal-likehihood decision test on the measurement results, achieving orders-of-magnitude-lower error probability than the optimum classical systems in various examples, including `wine-tasting' and `drug-testing' where real molecules are considered. In detecting the presence of an absorption line, our quantum scheme achieves the optimum performance allowed by quantum mechanics. The quantum advantage in our system is robust against noise and loss, which makes near-term experimental demonstration possible.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | 6+16 pages, 6+13 figures, accepted by Phys. Rev. Lett |
Keywords: | quant-ph,physics.optics |
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: | 28 Sep 2020 12:00 |
Last Modified: | 16 Oct 2024 16:59 |
Published Version: | https://doi.org/10.1103/PhysRevLett.125.180502 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1103/PhysRevLett.125.180502 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:166032 |