Entanglement-enhanced time-continuous quantum control in optomechanics

Abstract

The cavity-optomechanical radiation pressure interaction provides the means to create entanglement between a mechanical oscillator and an electromagnetic field interacting with it. Here we show how we can utilize this entanglement within the framework of time-continuous quantum control, in order to engineer the quantum state of the mechanical system. Specifically, we analyze how to prepare a low-entropy mechanical state by (measurement-based) feedback cooling operated in the blue detuned regime, the creation of bipartite mechanical entanglement via time-continuous entanglement swapping, and preparation of a squeezed mechanical state by time-continuous teleportation. The protocols presented here are feasible in optomechanical systems exhibiting a cooperativity larger than 1.

18 pages, 12 figures

References in corpus (10)

• Sideband Cooling Micromechanical Motion to the Quantum Ground State
• Quantum Theory of Cavity-Assisted Sideband Cooling of Mechanical Motion
• Theory of ground state cooling of a mechanical oscillator using dynamical back-action
• Ground-state cooling of a micromechanical oscillator: generalized framework for cold damping and cavity-assisted cooling schemes
• Observation of Radiation Pressure Shot Noise on a Macroscopic Object
• Feedback cooling of a cantilever's fundamental mode below 5 mK
• Robust entanglement of a micromechanical resonator with output optical fields
• Back-action evasion and squeezing of a mechanical resonator using a cavity detector
• Nanomechanical squeezing with detection via a microwave cavity
• Optimal Quantum Filtering and Quantum Feedback Control

Cited by in corpus (4)

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• Light-mediated strong coupling between a mechanical oscillator and atomic spins one meter apart
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• Rapid cooling of a strain-coupled oscillator by optical phaseshift measurement