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Experimentally realizable characterizations of continuous variable Gaussian states

Kim, M.S.; Lee, Jinhyoung; Munro, William J.

HPL-2002-179

Keyword(s): quantum information; coherent pulses; continuous variable characterisation

Abstract: Measures of entanglement, fidelity and purity are basic yardsticks in quantum information processing. We propose how to implement these measures using linear devices and homodyne detectors for continuous variable Gaussian states. In particular, the test of entanglement becomes simple with some prior knowledge which is relevant to current experiments. Notes: M.S. Kim and Jinhyoung Lee, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, UK

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