Ground-state cooling based on a three-cavity optomechanical system in the unresolved-sideband regime*

Abstract

In the unresolved sideband regime, we propose a scheme for cooling mechanical resonator close to its ground state in a three-cavity optomechanical system, where the auxiliary cavities are indirectly connected with the mechanical resonator through standard optomechanical subsystem. The standard optomechanical subsystem is driven by a strong pump laser field. With the help of the auxiliary cavities, the heating process is suppressed and the cooling process of the mechanical resonator is enhanced. More importantly, the average phonon number is much less than 1 in a larger range. This means that the mechanical resonator can be cooled down to its ground state. All these interesting features will significantly promote the physical realization of quantum effects in multi-cavity optomechanical systems.

Ideal optomechanically induced transparency generation in a cavity optoelectromechanical system*

“…The third one is the different dispersion curve slope. In the following section, we will study the position of the ideal OMIT dip, the ideal transparency window width and the dispersion curve slope in cavity optoelectromechanical system by adjusting Coulomb coupling strength η, cavity decay rates κ c , and charged mechanical resonator Equation (10) shows that the Coulomb coupling strength η is the parameter that could affect the position of the ideal OMIT dip x 0 . Therefore, how to modulate Coulomb coupling strength η becomes a issue.…”

“…Cavity optomechanical systems have become one hot topic in the development of manipulating light. During the past decades, scientists have never stopped exploring, then a series of phenomena have been obtained one after the other in cavity optomechanical systems, for example, optomechanically induced transparency (OMIT), [4,5] entanglement, [8] ground-state cooling of the mechanical resonator, [9][10][11] optomechanically induced absorption, [7,12] amplification, [13] normal-mode splitting, [14] and Fano resonance. [15] A notable achievement discovered among these phenomena is OMIT, which has been first proposed theoretically in Ref.…”

Perfect optomechanically induced transparency in two-cavity optomechanics

“…With the development of nanotechnology, various physical systems which can exhibit such interaction have been proposed and investigated, such as Fabry-Perot cavities [2,3], whispering-gallery microcavities [4][5][6], superconducting circuits [7,8] and membranes [9][10][11][12]. The optomechanical interaction can strongly affect the motion of mechanical oscillator and the optical properties in these systems, and then various interesting quantum phenomena can be generated, such as ground-state cooling of mechanical modes [13][14][15][16][17][18][19][20], quantum entanglement [21][22][23][24][25][26][27][28], mechanical squeezing [29], unconventional photon blockade [30], and optomechanically induced transmission and absorption [31][32][33][34][35][36][37][38][39][40][41][42].…”