Highly efficient cooling of mechanical resonator with square pulse drives

2018/12/12 by Qing Lin, Bing He
Engineering · Physics and Astronomy · #Acoustics #Advanced Fiber Laser Technologies #Amplitude #Atomic physics #Ground state #Laser #Laser cooling #Materials science #Mechanical and Optical Resonators #Optics #Photonic and Optical Devices #Physics #Pulse (music) #Quantum mechanics #Resolved sideband cooling #Resonator #Square (algebra) #Square wave #Thermal #quant-ph

paper · pdf · doi:10.1364/oe.26.033830

published as Optics Express, 26, 33830-33840 (2018) · 11 pages, 6 figures

openalex publication_date 2018/12/12 · arxiv created 2019/01/27 · arxiv updated 2019/01/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Ground state cooling of mechanical resonator is a way to generate macroscopic quantum states. Here we present a study of optomechanical cooling under the drive of square pulses without smooth profile. By illustrating the dynamical processes of cooling, we show how to choose the amplitudes and durations of square pulses, as well as the intervals between them, so that a mechanical resonator can be quickly cooled down to its ground state. Compared with the cooling under a continuous-wave drive field, the ground state cooling of a mechanical resonator can be performed more efficiently and flexibly by using square pulse drives. At certain times of such cooling process, the thermal phonon number under square pulse drives can become even lower than the theoretical limit for the cooling with a continuous-wave drive field of the same amplitude.

Citations

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