Published 2000
| public
Book Section - Chapter
Dense Coding for Continuous Variables
- Creators
- Braunstein, Samuel L.
- Kimble, H. J.
- Others:
- Braunstein, Samuel L.
- Pati, Arun K.
Abstract
A scheme to achieve dense quantum coding for the quadrature amplitudes of the electromagnetic field is presented. The protocol utilizes shared entanglement provided by nondegenerate parametric down-conversion in the limit of large gain to attain high efficiency. For a constraint in the mean number of photons n̄ associated with modulation in the signal channel, the channel capacity for dense coding is found to be ln(1+n̄+n̄^2), which always beats coherent-state communication and surpasses squeezed-state communication for n̄>1. For n̄≫1, the dense coding capacity approaches twice that of either scheme.
Additional Information
© 2000 American Physical Society. S .L.B. was supported in part by the UK Engineering and Physical Sciences Research Council and the Royal Academy of Engineering. The work of H.J.K. is supported by DARPA via the QUIC Institute which is administered by ARO, by the Office of Naval Research, and by the National Science Foundation.Additional details
- Eprint ID
- 99271
- Resolver ID
- CaltechAUTHORS:20191015-105620795
- Engineering and Physical Sciences Research Council (EPSRC)
- Royal Academy of Engineering
- Defense Advanced Research Projects Agency (DARPA)
- Army Research Office (ARO)
- Office of Naval Research (ONR)
- NSF
- Created
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2019-10-15Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field