Partial Optomechanical Refrigeration via Multimode Cold-Damping Feedback

Sommer C, Genes C (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Physical Review Letters American Physical Society

Book Volume: 123

Article Number: 203605

Journal Issue: 20

DOI: 10.1103/PhysRevLett.123.203605

Abstract

We provide a fully analytical treatment for the partial refrigeration of the thermal motion of a quantum mechanical resonator under the action of feedback. As opposed to standard cavity optomechanics where the aim is to isolate and cool a single mechanical mode, the aim here is to extract the thermal energy from many vibrational modes within a large frequency bandwidth. We consider a standard cold-damping technique, where homodyne readout of the cavity output field is fed into a feedback loop that provides a cooling action directly applied on the mechanical resonator. Analytical and numerical results predict that low final occupancies are achievable independent of the number of modes addressed by the feedback, as long as the cooling rate is smaller than the intermode frequency separation. For resonators exhibiting a few nearly degenerate pairs of modes, cooling is less efficient and a weak dependence on the number of modes is obtained. These scalings hint toward the design of frequency-resolved mechanical resonators, where efficient refrigeration is possible via simultaneous cold-damping feedback.

Additional Organisation(s)

Department Physik

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light

Germany (DE)

How to cite

APA:

Sommer, C., & Genes, C. (2019). Partial Optomechanical Refrigeration via Multimode Cold-Damping Feedback. Physical Review Letters, 123(20). https://doi.org/10.1103/PhysRevLett.123.203605

MLA:

Sommer, Christian, and Claudiu Genes. "Partial Optomechanical Refrigeration via Multimode Cold-Damping Feedback." Physical Review Letters 123.20 (2019).

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