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Continuous-Variable Entanglement Swapping

1
Department of Physics, University of Toronto, Toronto, M5S 1A7, Canada
2
QKD Corp., 60 St. George St., Toronto, M5S 1A7, Canada
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Author to whom correspondence should be addressed.
Entropy 2015, 17(5), 3152-3159; https://doi.org/10.3390/e17053152
Received: 26 March 2015 / Revised: 1 May 2015 / Accepted: 4 May 2015 / Published: 13 May 2015
(This article belongs to the Special Issue Quantum Cryptography)
We present a very brief overview of entanglement swapping as it relates to continuous-variable quantum information. The technical background required is discussed and the natural link to quantum teleportation is established before discussing the nature of Gaussian entanglement swapping. The limitations of Gaussian swapping are introduced, along with the general applications of swapping in the context of to quantum communication and entanglement distribution. In light of this, we briefly summarize a collection of entanglement swapping schemes which incorporate a non-Gaussian ingredient and the benefits of such schemes are noted. Finally, we motivate the need to further study and develop such schemes by highlighting requirements of a continuous-variable repeater. View Full-Text
Keywords: continuous variables; entanglement swapping; quantum teleportation continuous variables; entanglement swapping; quantum teleportation
MDPI and ACS Style

Marshall, K.; Weedbrook, C. Continuous-Variable Entanglement Swapping. Entropy 2015, 17, 3152-3159.

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