0000000000020182

AUTHOR

Raphaël Khan

showing 2 related works from this author

Enhancing Optomechanical Coupling via the Josephson Effect

2013

Cavity optomechanics is showing promise for studying quantum mechanics in large systems. However, smallness of the radiation-pressure coupling is a serious hindrance. Here we show how the charge tuning of the Josephson inductance in a single-Cooper-pair transistor (SCPT) can be exploited to arrange a strong radiation pressure -type coupling $g_0$ between mechanical and microwave resonators. In a certain limit of parameters, such a coupling can also be seen as a qubit-mediated coupling of two resonators. We show that this scheme allows reaching extremely high $g_0$. Contrary to the recent proposals for exploiting the non-linearity of a large radiation pressure coupling, the main non-linearit…

electromagnetic fieldsJosephson effectmicromechanical resonatorsPhononta221FOS: Physical sciencesGeneral Physics and AstronomyType (model theory)01 natural sciencesvibrationsSuperconductivity (cond-mat.supr-con)010309 opticsResonatorMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciences010306 general physicsta218OptomechanicsPhysicsQuantum Physicsta214ta114Condensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsPhysicsCondensed Matter - SuperconductivityJosephson effectCharge (physics)Coupling (probability)cavity optomechanical systemsQuantum Physics (quant-ph)Coupling coefficient of resonatorsPhysical Review Letters
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Cross-Kerr nonlinearity in optomechanical systems

2015

We consider the response of a nanomechanical resonator interacting with an electromagnetic cavity via a radiation pressure coupling and a cross-Kerr coupling. Using a mean field approach we solve the dynamics of the system, and show the different corrections coming from the radiation pressure and the cross-Kerr effect to the usually considered linearized dynamics.

PhysicsQuantum PhysicsCondensed Matter - Mesoscale and Nanoscale Physicsta114Kerr nonlinearitynanomechanical resonatorsDynamics (mechanics)FOS: Physical sciencesPhysics::Optics01 natural sciencesAtomic and Molecular Physics and Optics010309 opticsNanomechanical resonatorCoupling (physics)Classical mechanicsRadiation pressureElectromagnetic cavityMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesQuantum Physics (quant-ph)010306 general physicsPhysical Review A
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