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

J Janszky1,2, A Gábris1, M Koniorczyk1,2, A Vukics1 and J Asboth1

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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.


PACS

03.67.Mn Entanglement measures, witnesses, and other characterizations

42.50.Dv Quantum state engineering and measurements

37.10.Vz Mechanical effects of light on atoms, molecules, and ions

03.65.Ud Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)

Subjects

Atomic and molecular physics

Computational physics

Optics, quantum optics and lasers

Quantum information and quantum mechanics

Dates

Issue 3 (June 2002)

Received 19 November 2001, in final form 7 February 2002

Published 27 March 2002



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