Abstract
A quantum channel consisting of continuous variable quantum teleportation based on the standard protocol is investigated. It is shown that a quantum channel for continuous variable teleportation by an aribitrary entangled state is equivalent to a generalized thermalizing channel. We also study the transmission of nonclassical states by a teleportation channel with a two-mode squeezed-vacuum state in a noisy environment. The transmisson performance is evaluated by using the Glauber-Sudarshan P function and the nonclassical depth. Finally, we compare the results obtained to those of a noisy direct transmission channel. It is shown that the teleportation channel performs better than the direct transmission channel in a certain region.
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From Optika i Spektroskopiya, Vol. 94, No. 5, 2003, pp. 734–742.
Original English Text Copyright © 2003 by Takeoka, Sasaki, Ban.
This article was submitted by the authors in English.
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Takeoka, M., Sasaki, M. & Ban, M. Continuous variable teleportation as a quantum channel. Opt. Spectrosc. 94, 675–683 (2003). https://doi.org/10.1134/1.1576834
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DOI: https://doi.org/10.1134/1.1576834