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Steady-state mechanical squeezing in a hybrid atom-optomechanical system with a highly dissipative cavity.

Wang DY, Bai CH, Wang HF, Zhu AD, Zhang S - Sci Rep (2016)

Bottom Line: Quantum squeezing of mechanical resonator is important for studying the macroscopic quantum effects and the precision metrology of weak forces.The validity of the scheme is assessed by simulating the steady-state variance of the mechanical displacement quadrature numerically.The scheme is robust against dissipation of the optical cavity, and the steady-state squeezing can be effectively generated in a highly dissipative cavity.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.

ABSTRACT
Quantum squeezing of mechanical resonator is important for studying the macroscopic quantum effects and the precision metrology of weak forces. Here we give a theoretical study of a hybrid atom-optomechanical system in which the steady-state squeezing of the mechanical resonator can be generated via the mechanical nonlinearity and cavity cooling process. The validity of the scheme is assessed by simulating the steady-state variance of the mechanical displacement quadrature numerically. The scheme is robust against dissipation of the optical cavity, and the steady-state squeezing can be effectively generated in a highly dissipative cavity.

No MeSH data available.


The steady-state amplitudes /α/ and β versus the driving power P.The parameters are chosen to be ωm/(2π) = 5 MHz, ωa/(2π) = 500 THz, δa = 400 ωm, Δc = −0.9 ωm, G0 = 6.3 ωm, g = 10−3 ωm, η = 10−4 ωm, κ = 10 ωm, γc = 0.1 ωm, γm = 10−6 ωm, and .
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f2: The steady-state amplitudes /α/ and β versus the driving power P.The parameters are chosen to be ωm/(2π) = 5 MHz, ωa/(2π) = 500 THz, δa = 400 ωm, Δc = −0.9 ωm, G0 = 6.3 ωm, g = 10−3 ωm, η = 10−4 ωm, κ = 10 ωm, γc = 0.1 ωm, γm = 10−6 ωm, and .

Mentions: One can see that when the driving power P is in the microwatt range, the amplitudes of the cavity and mechanical modes satisfy the relationships: /α/, /β/ ≫ 1, as shown in Fig. 2. And the amplitudes of the cavity and mechanical modes increase with increasing the driving power. For example, at the point of the driving power P = 49 mW, /α/ ≃ 670 and β ≃ 330 can be obtained, respectively.


Steady-state mechanical squeezing in a hybrid atom-optomechanical system with a highly dissipative cavity.

Wang DY, Bai CH, Wang HF, Zhu AD, Zhang S - Sci Rep (2016)

The steady-state amplitudes /α/ and β versus the driving power P.The parameters are chosen to be ωm/(2π) = 5 MHz, ωa/(2π) = 500 THz, δa = 400 ωm, Δc = −0.9 ωm, G0 = 6.3 ωm, g = 10−3 ωm, η = 10−4 ωm, κ = 10 ωm, γc = 0.1 ωm, γm = 10−6 ωm, and .
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835766&req=5

f2: The steady-state amplitudes /α/ and β versus the driving power P.The parameters are chosen to be ωm/(2π) = 5 MHz, ωa/(2π) = 500 THz, δa = 400 ωm, Δc = −0.9 ωm, G0 = 6.3 ωm, g = 10−3 ωm, η = 10−4 ωm, κ = 10 ωm, γc = 0.1 ωm, γm = 10−6 ωm, and .
Mentions: One can see that when the driving power P is in the microwatt range, the amplitudes of the cavity and mechanical modes satisfy the relationships: /α/, /β/ ≫ 1, as shown in Fig. 2. And the amplitudes of the cavity and mechanical modes increase with increasing the driving power. For example, at the point of the driving power P = 49 mW, /α/ ≃ 670 and β ≃ 330 can be obtained, respectively.

Bottom Line: Quantum squeezing of mechanical resonator is important for studying the macroscopic quantum effects and the precision metrology of weak forces.The validity of the scheme is assessed by simulating the steady-state variance of the mechanical displacement quadrature numerically.The scheme is robust against dissipation of the optical cavity, and the steady-state squeezing can be effectively generated in a highly dissipative cavity.

View Article: PubMed Central - PubMed

Affiliation: Department of Physics, College of Science, Yanbian University, Yanji, Jilin 133002, China.

ABSTRACT
Quantum squeezing of mechanical resonator is important for studying the macroscopic quantum effects and the precision metrology of weak forces. Here we give a theoretical study of a hybrid atom-optomechanical system in which the steady-state squeezing of the mechanical resonator can be generated via the mechanical nonlinearity and cavity cooling process. The validity of the scheme is assessed by simulating the steady-state variance of the mechanical displacement quadrature numerically. The scheme is robust against dissipation of the optical cavity, and the steady-state squeezing can be effectively generated in a highly dissipative cavity.

No MeSH data available.