Cavitation density of superfluid helium-4 around 1 K

Qu, An; Trimeche, Azer; Dupont‐Roc, J.; Grucker, Jules; Jacquier, Ph.

doi:10.1103/physrevb.91.214115

Cited by 15 publications

(28 citation statements)

References 19 publications

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“…Recent advances in optomechanics, has brought the possibility of optomechanical squeezing of light into perspective as well [104][105][106][107][108][109]. Optomechanical squeezing of light in homodyne detection within a small amount also occurs, and can be observed using a novel quantum feedback control scheme which has been recently reported [110].…”

Section: A Methods Of Squeezingmentioning

confidence: 99%

Third-Order Optical Nonlinearity in Two-Dimensional Transition Metal Dichalcogenides

Khorasani¹

2018

Commun. Theor. Phys.

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We present a detailed calculation of the linear and nonlinear optical response of four types of monolayer two-dimensional (2D) transition-metal dichalcogenides (TMDCs), having the formula MX2 with M=Mo,W and X=S,Se. The calculations are based on 6-band tight-binding model of TMDCs, and then performing a semi-classical perturbation analysis of response functions. We numerically calculate the linear χ (1) µν (−ω; ω) and nonlinear surface susceptibility tensors χ (3) µνζη (−ωΣ; ωr, ωs, ωt) with ωΣ = ωr + ωs + ωt. Both non-degenerate and degenerate cases are studied for third-harmonic generation and nonlinear refractive index, respectively. Computational results obtained with no external fitting parameters are discussed regarding two recent reported experiments on MoS2, and thus we can confirm the extraordinarily strong optical nonlinearity of TMDCs. As a possible application, we demonstrate generation of a π 4 −rotated squeezed state by means of nonlinear response of TMDCs, in a silica micro-disk resonator covered with the 2D material. Our proposed method will enable accurate calculations of nonlinear optical response, such as four-wave mixing and high-harmonic generation in 2D materials and their heterostructures, thus enabling study of novel functionalities of 2D photonic integrated circuits.

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Section: A Methods Of Squeezingmentioning

confidence: 99%

Third-Order Optical Nonlinearity in Two-Dimensional Transition Metal Dichalcogenides

Khorasani¹

2018

Commun. Theor. Phys.

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“…The dissipative coupling offers several advantages, for example, it has been shown that the dissipative coupling can lead to near ground-state cooling of the mechanical resonator in the unresolved sideband limit [1,3,4,[6][7][8] and the squeezing of the mechanical oscillator [9][10][11]. A variety of other physical effects with dissipative coupling have been discussed: the normal mode splitting [12,13], the electromagnetically induced transparency [13], the squeezing of the output light [14,15], and many others [16,17]. An important application of the dissipative coupling is in the sensitive detection of the force and torque [5,18].…”

Section: Introductionmentioning

confidence: 99%

Robust force sensing for a free particle in a dissipative optomechanical system with a parametric amplifier

Huang

Agarwal

2017

Phys. Rev. A

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We theoretically investigate optical detection of a weak classical force acting on a free particle in a dissipative coupling optomechanical system with a degenerate parametric amplifier (PA). We show that the PA allows one to achieve the force sensitivity far better than the standard quantum limit (SQL) over a broad range of the detection frequencies. The improvement depends on the parametric gain and the driving power. Moreover, we discuss the effects of the mechanical damping and the thermal noise on the force sensitivity. We find that the robustness of the force sensitivity much better than the SQL against the mechanical damping and the thermal noise is achievable in the presence of the PA with a high parametric gain. For the temperature T = 1 K, the improvement in sensitivity is better by a factor of about 7 when the driving power is set at a value corresponding to the SQL with no PA.

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“…But the dissipation here does not lead to decoherence or absorption of light, instead, it results in lossless coupling between a continuous optical wave and a mode of an optical cavity. The cavity with dissipative coupling can be used as a perfect transducer between the continuous optical wave and the mechanical degree of freedom, allowing efficient cooling of the mechanical oscillator [21,[31][32][33][34], exchange of the quantum states between the optical and mechanical degrees of freedom, mechanical squeezing [35][36][37][38], and a combination of cooling and squeezing [39,40]. A combination of conventional, dispersive, and dissipative coupling adds more complexity to the interaction and leads to the new effects [41,42].…”

Section: Introductionmentioning

confidence: 99%