Enhanced quantum communication via optical refocusing
We consider the problem of quantum communication mediated by a passive optical refocusing system. The model captures the basic features of all those situations in which a signal is either refocused by a repeater for long-distance communication, or it is focused on a detector prior to the information...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/66970 |
| _version_ | 1811088326453624832 |
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| author | Lupo, Cosmo Giovannetti, Vittorio Pirandola, Stefano Mancini, Stefano Lloyd, Seth |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Lupo, Cosmo Giovannetti, Vittorio Pirandola, Stefano Mancini, Stefano Lloyd, Seth |
| author_sort | Lupo, Cosmo |
| collection | MIT |
| description | We consider the problem of quantum communication mediated by a passive optical refocusing system. The model captures the basic features of all those situations in which a signal is either refocused by a repeater for long-distance communication, or it is focused on a detector prior to the information decoding process. Introducing a general method for linear passive optical systems, we determine the conditions under which optical refocusing implies information transmission gain. Although the finite aperture of the repeater may cause loss of information, we show that the presence of the refocusing system can substantially enhance the rate of reliable communication with respect to the free-space propagation. We explicitly address the transferring of classical messages over the quantum channel, but the results can be easily extended to include the case of transferring quantum messages as well. |
| first_indexed | 2024-09-23T14:00:27Z |
| format | Article |
| id | mit-1721.1/66970 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:00:27Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/669702022-09-28T17:38:56Z Enhanced quantum communication via optical refocusing Lupo, Cosmo Giovannetti, Vittorio Pirandola, Stefano Mancini, Stefano Lloyd, Seth Massachusetts Institute of Technology. Department of Mechanical Engineering Lloyd, Seth Lloyd, Seth We consider the problem of quantum communication mediated by a passive optical refocusing system. The model captures the basic features of all those situations in which a signal is either refocused by a repeater for long-distance communication, or it is focused on a detector prior to the information decoding process. Introducing a general method for linear passive optical systems, we determine the conditions under which optical refocusing implies information transmission gain. Although the finite aperture of the repeater may cause loss of information, we show that the presence of the refocusing system can substantially enhance the rate of reliable communication with respect to the free-space propagation. We explicitly address the transferring of classical messages over the quantum channel, but the results can be easily extended to include the case of transferring quantum messages as well. European Commission (Grant Agreement CORNER (FP7-ICT-213681)) Italian Ministry of Education, Universities and Research (FIRB-IDEAS project RBID08B3FM) 2011-11-08T19:58:22Z 2011-11-08T19:58:22Z 2011-07 2011-01 Article http://purl.org/eprint/type/JournalArticle 1050-2947 1094-1622 http://hdl.handle.net/1721.1/66970 Lupo, Cosmo et al. “Enhanced quantum communication via optical refocusing.” Physical Review A 84 (2011): n. pag. Web. 8 Nov. 2011. © 2011 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevA.84.010303 Physical Review A Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Lupo, Cosmo Giovannetti, Vittorio Pirandola, Stefano Mancini, Stefano Lloyd, Seth Enhanced quantum communication via optical refocusing |
| title | Enhanced quantum communication via optical refocusing |
| title_full | Enhanced quantum communication via optical refocusing |
| title_fullStr | Enhanced quantum communication via optical refocusing |
| title_full_unstemmed | Enhanced quantum communication via optical refocusing |
| title_short | Enhanced quantum communication via optical refocusing |
| title_sort | enhanced quantum communication via optical refocusing |
| url | http://hdl.handle.net/1721.1/66970 |
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