Phys. Rev. A 78, 062340 (2008) [9 pages]Optimal fidelity of teleportation of coherent states and entanglementReceived 20 August 2008; published 31 December 2008 We study the Braunstein-Kimble protocol for the continuous variable teleportation of a coherent state. We determine lower and upper bounds for the optimal fidelity of teleportation, maximized over all local Gaussian operations for a given entanglement of the two-mode Gaussian state shared by the sender (Alice) and the receiver (Bob). We also determine the optimal local transformations at Alice and Bob sites and the corresponding maximum fidelity when one restricts to local trace-preserving Gaussian completely positive maps. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.78.062340
DOI:
10.1103/PhysRevA.78.062340
PACS:
03.67.Hk, 03.67.Mn, 03.65.Ud
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