Capacities of linear quantum optical systems
A wide variety of communication channels employ the quantized electromagnetic field to convey information. Their communication capacity crucially depends on losses associated to spatial characteristics of the channel such as diffraction and antenna design. Here we focus on the communication via a fi...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2012
|
| Online Access: | http://hdl.handle.net/1721.1/73517 |
| _version_ | 1811097704145616896 |
|---|---|
| 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 | A wide variety of communication channels employ the quantized electromagnetic field to convey information. Their communication capacity crucially depends on losses associated to spatial characteristics of the channel such as diffraction and antenna design. Here we focus on the communication via a finite pupil, showing that diffraction is formally described as a memory channel. By exploiting this equivalence we then compute the communication capacity of an optical refocusing system, modeled as a converging lens. Even though loss of information originates from the finite pupil of the lens, we show that the presence of the refocusing system can substantially enhance the communication capacity. We mainly concentrate on communication of classical information, the extension to quantum information being straightforward. |
| first_indexed | 2024-09-23T17:03:17Z |
| format | Article |
| id | mit-1721.1/73517 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:03:17Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/735172022-10-03T10:05:29Z Capacities of linear quantum optical systems Lupo, Cosmo Giovannetti, Vittorio Pirandola, Stefano Mancini, Stefano Lloyd, Seth Massachusetts Institute of Technology. Department of Mechanical Engineering Lloyd, Seth Lloyd, Seth A wide variety of communication channels employ the quantized electromagnetic field to convey information. Their communication capacity crucially depends on losses associated to spatial characteristics of the channel such as diffraction and antenna design. Here we focus on the communication via a finite pupil, showing that diffraction is formally described as a memory channel. By exploiting this equivalence we then compute the communication capacity of an optical refocusing system, modeled as a converging lens. Even though loss of information originates from the finite pupil of the lens, we show that the presence of the refocusing system can substantially enhance the communication capacity. We mainly concentrate on communication of classical information, the extension to quantum information being straightforward. European Union (grant MOIF-CT-2006-039703) Engineering and Physical Sciences Research Council (grant EP/J00796X/1) Seventh Framework Programme (European Commission) (grant FP7/2007-2013 under grant agreement no. 213681) 2012-10-01T16:48:16Z 2012-10-01T16:48:16Z 2012-06 2012-01 Article http://purl.org/eprint/type/JournalArticle 1050-2947 1094-1622 http://hdl.handle.net/1721.1/73517 Lupo, Cosmo et al. “Capacities of Linear Quantum Optical Systems.” Physical Review A 85.6 (2012): 062314. © 2012 American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevA.85.062314 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 Capacities of linear quantum optical systems |
| title | Capacities of linear quantum optical systems |
| title_full | Capacities of linear quantum optical systems |
| title_fullStr | Capacities of linear quantum optical systems |
| title_full_unstemmed | Capacities of linear quantum optical systems |
| title_short | Capacities of linear quantum optical systems |
| title_sort | capacities of linear quantum optical systems |
| url | http://hdl.handle.net/1721.1/73517 |
| work_keys_str_mv | AT lupocosmo capacitiesoflinearquantumopticalsystems AT giovannettivittorio capacitiesoflinearquantumopticalsystems AT pirandolastefano capacitiesoflinearquantumopticalsystems AT mancinistefano capacitiesoflinearquantumopticalsystems AT lloydseth capacitiesoflinearquantumopticalsystems |