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arXiv · 1409.8338

Anomalous optical bistability and robust entanglement of mechanical oscillators using two-photon coherence

Eyob A. Sete·H. Eleuch
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Abstract

Quantum coherence is one of the most intriguing applications of quantum mechanics, and has led to interesting phenomena and uncommon results. Here we show that in a stark contrast to the usual red-detuned condition to observe bistability in single-mode optomechanics, the optical intensities exhibit bistability for all values of cavity-laser detuning due to intermode coupling induced by the two-photon coherence. Interestingly, an unconventional bistability with "ribbon"-shaped hysteresis can be observed for blue-detuned laser frequencies. We also demonstrate that the two-photon coherence leads to a strong entanglement between the movable mirrors in the adiabatic regime. Surprisingly, the mirror-mirror entanglement is shown to persist for environment temperature of the phonon bath up to 12 K using experimental parameters.

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Eyob A. Sete, H. Eleuch. 2014-09-29. Anomalous optical bistability and robust entanglement of mechanical oscillators using two-photon coherence. https://doi.org/10.1364/josab.32.000971

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