Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ions

Details Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ions Measure of phonon-number moments and motional quadratures through infinitesimal-time probing of trapped ions

2005-06-13

arxiv.org/abs/quant-ph/0506098v2

J. Phys. B: At. Mol. Opt. Phys. 39, 685 (2006)

Physics

Quantum Physics

10 pages. Accepted in JPhysB

Scientific paper

10.1088/0953-4075/39/3/020

A method for gaining information about the phonon-number moments and the generalized nonlinear and linear quadratures in the motion of trapped ions (in particular, position and momentum) is proposed, valid inside and outside the Lamb-Dicke regime. It is based on the measurement of first time derivatives of electronic populations, evaluated at the motion-probe interaction time t=0. In contrast to other state-reconstruction proposals, based on measuring Rabi oscillations or dispersive interactions, the present scheme can be performed resonantly at infinitesimal short motion-probe interaction times, remaining thus insensitive to decoherence processes.

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