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Abstract: Recent experimental results demonstrated the generation of a quantumsuperpositon MQS, involving a number of photons in excess of 5x10^4, whichshowed a high resilience to losses. In order to perform a complete analysis onthe effects of de-coherence on this multiphoton fields, obtained through theQuantum Injected Optical Parametric Amplifier QIOPA, we invesigatetheoretically the evolution of the Wigner functions associated to these statesin lossy conditions. Recognizing the presence of negative regions in theW-representation as an evidence of non-classicality, we focus our analysis onthis feature. A close comparison with the MQS based on coherent states allowsto identify differences and analogies.



Autor: Nicolo' Spagnolo, Chiara Vitelli, Tiziano De Angelis, Fabio Sciarrino, Francesco De Martini

Fuente: https://arxiv.org/



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