Volume 122, Number 1, April 2018
|Number of page(s)||5|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||25 May 2018|
Squeezed cooling of mechanical motion beyond the resolved-sideband limit
1 School of Physics and Information Technology, Shaanxi Normal University - Xi'an 710061, PRC
2 Department of Physics and Astronomy, Shanghai Jiao Tong University - Shanghai 200240, PRC
Received: 12 December 2017
Accepted: 30 April 2018
Cavity optomechanics provides a unique platform for controlling micromechanical systems by means of optical fields that cross the classical-quantum boundary to achieve solid foundations for quantum technologies. Currently, optomechanical resonators have become promising candidates for the development of precisely controlled nano-motors, ultrasensitive sensors and robust quantum information processors. For all these applications, a crucial requirement is to cool the mechanical resonators down to their quantum ground states. In this paper, we present a novel cooling scheme to further cool a micromechanical resonator via the noise squeezing effect. One quadrature in such a resonator can be squeezed to induce enhanced fluctuations in the other, “heated” quadrature, which can then be used to cool the mechanical motion via conventional optomechanical coupling. Our theoretical analysis and numerical calculations demonstrate that this squeeze-and-cool mechanism offers a quick technique for deeply cooling a macroscopic mechanical resonator to an unprecedented temperature region below the zero-point fluctuations.
PACS: 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 45.80.+r – Control of mechanical systems
© EPLA, 2018
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