Cooling and squeezing the fluctuations of a nanomechanical beam by indirect quantum feedback control
arXiv:0902.2526 · doi:10.1103/PhysRevA.79.052102
Abstract
We study cooling and squeezing the fluctuations of a nanomechanical beam using quantum feedback control. In our model, the nanomechanical beam is coupled to a transmission line resonator via a superconducting quantum interference device (SQUID). The leakage of the electromagnetic field from the transmission line resonator is measured using homodyne detection. This measured signal is then used to design a quantum-feedback-control signal to drive the electromagnetic field in the transmission line resonator. Although the control is imposed on the transmission line resonator, this quantum-feedback-control signal indirectly affects the thermal motion of the nanomechanical beam via the inductive beam-resonator coupling, making it possible to cool and squeeze the fluctuations of the beam, allowing it to approach the standard quantum limit.
14 pages, 9 figures
References in corpus (16)
- 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
- Ground-state cooling of a micromechanical oscillator: generalized framework for cold damping and cavity-assisted cooling schemes
- Cooling a nanomechanical resonator with quantum back-action
- Feedback cooling of a cantilever's fundamental mode below 5 mK
- Feedback control of quantum state reduction
- Dynamical Backaction of Microwave Fields on a Nanomechanical Oscillator
- Two-resonator circuit QED: A superconducting quantum switch
- Quantum Kalman Filtering and the Heisenberg Limit in Atomic Magnetometry
- Single-qubit lasing and cooling at the Rabi frequency
- Quantum Feedback Control of Atomic Motion in an Optical Cavity
- Squeezing of a nanomechanical resonator by quantum nondemolition measurement and feedback
- Feedback cooling of atomic motion in cavity QED
- Ground state cooling of a nanomechanical resonator via a Cooper pair box qubit
- Relation between fundamental estimation limit and stability in linear quantum systems with imperfect measurement