Radiation Pressure Cooling as a Quantum Dynamical Process
arXiv:1706.02955 · doi:10.1103/PhysRevLett.118.233604
Abstract
One of the most fundamental problems in optomechanical cooling is how small the thermal phonon number of a mechanical oscillator can be achieved under the radiation pressure of a proper cavity field. Different from previous theoretical predictions, which were based on an optomechanical system's time-independent steady states, we treat such cooling as a dynamical process of driving the mechanical oscillator from its initial thermal state, due to its thermal equilibrium with the environment, to a stabilized quantum state of higher purity. We find that the stabilized thermal phonon number left in the end actually depends on how fast the cooling process could be. The cooling speed is decided by an effective optomechanical coupling intensity, which constitutes an essential parameter for cooling, in addition to the sideband resolution parameter that has been considered in other theoretical studies. The limiting thermal phonon number that any cooling process cannot surpass exhibits a discontinuous jump across a certain value of the parameter.
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References in corpus (14)
- Sideband Cooling Micromechanical Motion to the Quantum Ground State
- Optomechanical entanglement between a movable mirror and a cavity field
- Quantum Theory of Cavity-Assisted Sideband Cooling of Mechanical Motion
- Theory of ground state cooling of a mechanical oscillator using dynamical back-action
- Observation of strong coupling between a micromechanical resonator and an optical cavity field
- Ground-state cooling of a micromechanical oscillator: generalized framework for cold damping and cavity-assisted cooling schemes
- Sideband Cooling Beyond the Quantum Limit with Squeezed Light
- Dynamical Backaction of Microwave Fields on a Nanomechanical Oscillator
- Optomechanical sideband cooling of a micromechanical oscillator close to the quantum ground state
- Purity of Gaussian states: measurement schemes and time-evolution in noisy channels
- Cavity-Assisted Back Action Cooling of Mechanical Resonators
- Cooling carbon nanotubes to the phononic ground state with constant electron current
- Dynamical Phonon Laser in Coupled Active-Passive Microresonators
- Photon-Induced Spin-Orbit Coupling in Ultracold Atoms inside Optical Cavity