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2019-05-29Zeitschriftenartikel DOI: 10.1088/1367-2630/ab1b9e
Enhanced continuous generation of non-Gaussianity through optomechanical modulation
Qvarfort, Sofia cc
Serafini, Alessio
Xuereb, André cc
Rätzel, Dennis cc
Bruschi, David Edward cc
Mathematisch-Naturwissenschaftliche Fakultät
We study the non-Gaussian character of quantum optomechanical systems evolving under the fully nonlinear optomechanical Hamiltonian. By using a measure of non-Gaussianity based on the relative entropy of an initially Gaussian state, we quantify the amount of non-Gaussianity induced by both a constant and time-dependent cubic light–matter coupling and study its general and asymptotic behaviour. We find analytical approximate expressions for the measure of non-Gaussianity and show that initial thermal phonon occupation of the mechanical element does not significantly impact the non-Gaussianity. More importantly, we also show that it is possible to continuously increase the amount of non-Gassuianity of the state by driving the light–matter coupling at the frequency of mechanical resonance, suggesting a viable mechanism for increasing the non-Gaussianity of optomechanical systems even in the presence of noise.
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DOI
10.1088/1367-2630/ab1b9e
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https://doi.org/10.1088/1367-2630/ab1b9e
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<a href="https://doi.org/10.1088/1367-2630/ab1b9e">https://doi.org/10.1088/1367-2630/ab1b9e</a>