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One-complex-plane representation: a coherent-state description of entanglement and teleportation

J Janszky et al 2002 J. Opt. B: Quantum Semiclass. Opt. 4 S213-S217   doi: 10.1088/1464-4266/4/3/377  Help

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J Janszky1,2, A Gábris1, M Koniorczyk1,2, A Vukics1 and J Asboth1
1 Department of Nonlinear and Quantum Optics, Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, PO Box 49 H-1525 Budapest, Hungary
2 Institute of Physics, University of Pécs, Ifjúság út 6. H-7624 Pécs, Hungary

Abstract. It is shown that any state of two modes of the electromagnetic field (or any other bipartite bosonic system) can be expressed as a coherent superposition of conjugate coherent-state pairs. This representation has a deep connection with both the two-mode squeezing operator and a maximally entangled basis. A description of continuous variable quantum teleportation is presented, as an example of the application of this method.

Keywords: Coherent-state representation, two-mode squeezing, entanglement, teleportation

Print publication: Issue 3 (June 2002)
Received 19 November 2001, in final form 7 February 2002
Published 27 March 2002

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