Quantum teleportation with pair-coherent states

Abstract

Recently it has been argued that all presently performed continuous variable quantum teleportation experiments could be explained using a local hidden variable theory. In this paper we study a modification of the original protocol which requires a fully quantum mechanical explanation even when coherent states are teleported. Our calculations of the fidelity of teleportation using a pair-coherent state under ideal conditions suggests that fidelity above the required limit of 1/2 may be achievable in an experiment also.

Based on talks at the QIP workshop in 6th Joint Conference on Mathematics and Computer Science, Pecs, 12-15 July 2006; and Quantum 2006 - Workshop ad memoriam Carlo Novero, Turin. v2: Added reference to give credit to L. Vaidman

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• Multiphoton Bell-type inequality: a tool to unearth nonlocality of continuous variable quantum optical systems
• Even and odd nonlinear charge coherent states and their nonclassical properties