Witnessing non-classicality of a quantum oscillator state by coupling it to a qubit
arXiv:1207.5012 · doi:10.1103/PhysRevA.86.022341
Abstract
We propose a new witness operation for the non-classical character of a harmonic oscillator state. The method does not require state reconstruction. For all harmonic oscillator states that are classical, a bound is established for the evolution of a qubit which is coupled to the oscillator. Any violation of the bound can be rigorously attributed to the non-classical character of the initial oscillator state.
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References in corpus (5)
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Cited by in corpus (5)
- Amplification effects in optomechanics via weak measurement
- Non-classicality tests and entanglement witnesses for macroscopic mechanical superposition states
- Pulsed characteristic-function measurement of a thermalizing harmonic oscillator
- Gaussian state entanglement witnessing through lossy compression
- Effect of relativistic motion on witnessing non-classicality of quantum states