Noise-Free Measurement of Harmonic Oscillators with Instantaneous Interactions

Noise-free measurement of harmonic oscillators with instantaneous interactions.

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 trapp...

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Noise-Free Measurement of Harmonic Oscillators with Instantaneous Interactions

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