Noise-free measurement of harmonic oscillators with instantaneous interactions

M. França Santos, G. Giedke, E. Solano

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Abstract

We present a method of measuring the quantum state of a harmonic oscillator through instantaneous probe-system selective interactions of the Jaynes-Cummings type. We prove that this scheme is robust to general decoherence mechanisms, allowing the possibility of measuring fast-decaying systems in the weak-coupling regime. This method could be applied to different setups: motional states of trapped ions, microwave fields in cavity or circuit QED, and even intracavity optical fields. © 2007 The American Physical Society.
Original languageSpanish
JournalPhysical Review Letters
Volume98
StatePublished - 26 Jan 2007
Externally publishedYes

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