Braunstein, Samuel L. and Kimble, H. J. (2000) Dense Coding for Continuous Variables. In: Quantum Information with Continuous Variables. Springer , Dordrecht, pp. 95-103. ISBN 978-90-481-6255-0. https://resolver.caltech.edu/CaltechAUTHORS:20191015-105620795
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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.
Item Type: | Book Section | ||||||||||||||
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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. | ||||||||||||||
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Subject Keywords: | Entangle State; Quantum Channel; Channel Capacity; Wigner Function; Quantum Teleportation | ||||||||||||||
DOI: | 10.1007/978-94-015-1258-9_10 | ||||||||||||||
Record Number: | CaltechAUTHORS:20191015-105620795 | ||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20191015-105620795 | ||||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||
ID Code: | 99271 | ||||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||||
Deposited By: | Tony Diaz | ||||||||||||||
Deposited On: | 15 Oct 2019 18:22 | ||||||||||||||
Last Modified: | 16 Nov 2021 17:45 |
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