Quantum non-demolition measurement of photon-arrival using an atom-cavity system

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A simple and efficient quantum non-demolition measurement (QND) scheme is proposed in which the arrival of a signal photon is detected without affecting the qubit state. The proposed QND scheme functions even if the ancillary photon is replaced with weak light composed of vacuum and one-photon states. Although the detection scheme is designed for entanglement sharing applications, it is also suitable for general purification of a single photon state.
12pages, 4figures, Submitted to Phys. Rev. A

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/125705

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/quant-ph/0702138
 http://arxiv.org/abs/quant-ph/0702138
 Phys. Rev. A 75, 032320 (2007)

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arXiv