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Abstract: Quantum entanglement has been actively sought for in optomechanical andelectromechanical systems. The simplest such system is a mechanical oscillatorinteracting with a coherent beam, while the oscillator also suffers fromthermal decoherence. For this system, we show that quantum entanglement isalways present between the oscillator and continuous outgoing fields - evenwhen the environmental temperature is high and the oscillator is highlyclassical. Such universal entanglement is also shown to be able to survive morethan one oscillation cycle if characteristic frequency of the optomechanicalinteraction is larger than that of the thermal noise. Furthermore, we derivethe effective optical mode that is maximally entangled with the oscillator,which will be useful for future quantum computing and encoding information intomechanical degrees of freedom.



Autor: Haixing Miao, Stefan Danilishin, Yanbei Chen

Fuente: https://arxiv.org/



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