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Nonclassical characteristic functions for highly sensitive measurements

Th. Richter, W. Vogel

quant-pharXiv:quant-ph/0701214

Abstract

Characteristic functions are shown to be useful for highly sensitive measurements. Redistributions of motional Fock states of a trapped atom can be directly monitored via the most fragile nonclassical part of the characteristic function. The method can also be used for decoherence measurements in optical quantum-information systems.

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