Barnett, S. M. , Brougham, T., Croke, S. and Phoenix, S. J.D. (2019) Optimized attacks on twin-field quantum key distribution. Journal of the Optical Society of America B: Optical Physics, 36(3), B122-B129. (doi: 10.1364/JOSAB.36.00B122)
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Abstract
In twin-field quantum key distribution the two communicating parties, Alice and Bob, each send a weak coherent pulse to a third party stationed between them. The key bits are generated by interference between these pulses, with the results communicated to Alice and Bob. We consider optimized strategies for eavesdropping on the communication built upon state discrimination and quantum non-demolition measurements. We find that the best strategy comprises a two-step process but that even this does not compromise the security of the protocol.
| Item Type: | Articles |
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| Additional Information: | Funding: Royal Society (RP150122). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Barnett, Professor Stephen and Brougham, Dr Thomas and Croke, Dr Sarah |
| Authors: | Barnett, S. M., Brougham, T., Croke, S., and Phoenix, S. J.D. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of the Optical Society of America B: Optical Physics |
| Publisher: | Optical Society of America |
| ISSN: | 0740-3224 |
| ISSN (Online): | 1520-8540 |
| Published Online: | 27 February 2019 |
| Copyright Holders: | Copyright © 2019 Optical Society of America |
| First Published: | First published in Journal of the Optical Society of America B: Optical Physics 36(3):B122-B129 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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