Capacities of linear quantum optical systems
Name
Lupo-2012-Capacities of linear quantum optical systems.pdf
Size
342.14 KB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Lupo, Cosmo
Giovannetti, Vittorio
Pirandola, Stefano
Mancini, Stefano
Lloyd, Seth
Date Issued
June 2012
Journal
Physical Review A
Publisher
American Physical Society
Citation
Lupo, Cosmo et al. “Capacities of Linear Quantum Optical Systems.” Physical Review A 85.6 (2012): 062314. © 2012 American Physical Society.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
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.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevA.85.062314
