Parker, Ryan Charles, Joo, Jaewoo, Razavi, Mohsen et al. (1 more author) (2017) Hybrid photonic loss resilient entanglement swapping. Journal of Optics. ISSN 2040-8986
Abstract
We propose a scheme of loss-resilient entanglement swapping between two distant parties in lossy optical fibre. In this scheme, Alice and Bob each begin with a pair of entangled non-classical states; these 'hybrid states' of light are entangled discrete variable (Fock state) and continuous variable (CVs) (coherent state) pairs. The CV halves of each of these pairs are sent through lossy optical fibre to a middle location, where these states are then mixed (using a 50:50 beam-splitter) and measured. The detection scheme we use is to measure one of these modes via vacuum detection, and to measure the other mode using balanced homodyne detection. In this work we show that the $| {{\rm{\Phi }}}^{+}\rangle =(| 00\rangle +| 11\rangle )/\sqrt{2}$ Bell state can theoretically be produced following this scheme with high fidelity and entanglement, even when allowing for a small amount of loss. It can be shown that there is an optimal amplitude value (α) of the coherent state, when allowing for such loss. We also investigate the realistic circumstance when the loss is not balanced in the propagating modes. We demonstrate that a small amount of loss mismatch does not destroy the overall entanglement, thus demonstrating the physical practicality of this protocol.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 IOP Publishing Ltd |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number EPSRC UNSPECIFIED |
Depositing User: | Pure (York) |
Date Deposited: | 20 Sep 2017 10:15 |
Last Modified: | 08 Feb 2025 00:24 |
Published Version: | https://doi.org/10.1088/2040-8986/aa858a |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1088/2040-8986/aa858a |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121476 |
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