Nonreciprocal ground-state cooling of multiple mechanical resonators

Lai, Deng-Gao; Huang, Jinfeng; Yin, Xian-Li; Hou, Bo‐Yu; Li, Wenlin; Vitali, David; Nori, Franco; Liao, Jie‐Qiao

doi:10.1103/physreva.102.011502

Cited by 116 publications

(60 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…More recently, multimode optomechanical systems comprising two or more mechanical resonators have been under intensive investigation [39][40][41][42][43][44][45][46][47][48][49][50][51]. The displacement of one mechanical resonator changes the cavity resonance and hence the intracavity photon number, which will, in turn, modify the radiation pressure on the other mechanical resonator [52][53][54][55][56][57][58][59][60][61]. For example, the mechanical resonators can be coupled through stimulated Raman adiabatic passage (STIRAP) [62][63][64].…”

Section: Introductionmentioning

confidence: 99%

Energy-level attraction and heating-resistant cooling of mechanical resonators with exceptional points

2021

View full text Add to dashboard Cite

We study the energy-level evolution and ground-state cooling of mechanical resonators under a synthetic phononic gauge field. The tunable gauge phase is mediated by the phase difference between the PT -and anti-PT -symmetric mechanical couplings in a multimode optomechanical system. The transmission spectrum then exhibits an asymmetric Fano line shape or a double optomechanically induced transparency by modulating the gauge phase. Moreover, the eigenvalues will collapse and become degenerate, although the mechanical coupling is continuously increased. Such counterintuitive energy-level attraction, instead of anticrossing, is attributed to destructive interferences between PT -and anti-PT -symmetric couplings. We find that the energy-level attraction, as well as the accompanying exceptional points (EPs), can be clearly observed in the cavity output power spectrum where the mechanical eigenvalues correspond to distinct peaks. For mechanical cooling, the average phonon occupation number is minimized at the EPs. Especially, phonon transport becomes nonreciprocal and even ideally unidirectional at the EPs. Finally, we propose a heating-resistant ground-state cooling based on the nonreciprocal phonon transport, which is mediated by the gauge field. Towards the quantum regime of macroscopic mechanical resonators, most optomechanical systems are ultimately limited by their intrinsic cavity or mechanical heating. Our work shows that the thermal energy transfer can be blocked by tuning the gauge phase, which suggests a promising route to bypass the heating limitations.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy-level attraction and heating-resistant cooling of mechanical resonators with exceptional points

2021

View full text Add to dashboard Cite

show abstract

“…. (32) In the limit of zero time delay, this reduces to the expected result n eff = γ (n + 1/2 + C/2)/(γ + ) (as in Ref. [42]), where the effective damping rate is γ + .…”

Section: A Time Domain Analysis Of Steady Statementioning

confidence: 74%

“…While generally one aims for the isolation and cooling of a specific vibrational mode, it has been recently shown that efficient simultaneous cooling of a few independent modes is also possible in the case of either using sideband cooling [17], via machine learning [18], or cold damping [19]. Alternatively, cooling and strong light-matter couplings can also be achieved in an approach dubbed pulsed optomechanics [20][21][22][23] or in multielement optomechanical setups involving a few optical and mechanical modes [24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Multimode cold-damping optomechanics with delayed feedback

Sommer

Ghosh

Genes

2020

Phys. Rev. Research

View full text Add to dashboard Cite

We investigate the role of time delay in cold-damping optomechanics with multiple mechanical resonances. For instantaneous electronic response, it was recently shown by C. Sommer and C. Genes [Phys. Rev. Lett. 123, 203605 (2019)] that a single feedback loop is sufficient to simultaneously remove thermal noise from many mechanical modes. While the intrinsic delayed response of the electronics can induce single-mode and mutual heating between adjacent modes, we propose to counteract such detrimental effects by introducing an additional time delay to the feedback loop. For lossy cavities and broadband feedback, we derive analytical results for the final occupancies of the mechanical modes within the formalism of quantum Langevin equations. For modes that are frequency degenerate collective effects dominate, mimicking behavior similar to Dicke super-and subradiance. These analytical results, corroborated with numerical simulations of both transient and steady state dynamics, allow us to find suitable conditions and strategies for efficient single-mode or multimode feedback optomechanics.

show abstract

“…The main idea to treat this problem is to effectively suppress the heating rate of MR, for instance, by introducing other new auxiliary systems which are directly coupled to the original optical mode in the optomechanical system, [ 43 ] by directly using frequency modulation to improve mechanical cooling, [ 44,45 ] and by putting a second‐order χ (2) nonlinear medium which are simultaneously coupled with cavity photons and MR in the optical field. [ 46 ] More importantly, multimode optomechanical system, [ 47–50 ] which contains two or more MRs, have attracted widespread attention because they can be used to simulate complicated quantum systems and study abundant physical phenomena, such as collective dynamics, [ 51,52 ] energy transfer, [ 53 ] synchronization. [ 54,55 ] Similar to single MR cooling in conventional optomechanical systems, the simultaneous cooling of multiple MRs in multi‐mechanical systems is also strictly limited by sideband resolution, which has been reported in ref.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Cooling of Two Mechanical Resonators with Intracavity Squeezed Light

2021

View full text Add to dashboard Cite

A scheme is proposed to cool two mechanical resonators simultaneously to the quantum ground state, whatever sideband resolution, in an optomechanical system with χ(2) nonlinear medium, where the cavity light is squeezed. By selecting the system parameters appropriately, the influence from cavity dissipation can be completely removed and the quantum backaction heating is suppressed at the same time. It is found that the cooling performance is determined by the coupling strength and frequency detuning between two mechanical resonators. The numerical results indicate that the final phonon occupancy of the two mechanical resonators is no longer strictly limited by the sideband resolution and the cooling scheme can work well no matter in weak or strong effective optomechanical coupling regime.

show abstract

Nonreciprocal ground-state cooling of multiple mechanical resonators

Cited by 116 publications

References 69 publications

Energy-level attraction and heating-resistant cooling of mechanical resonators with exceptional points

Energy-level attraction and heating-resistant cooling of mechanical resonators with exceptional points

Multimode cold-damping optomechanics with delayed feedback

Simultaneous Cooling of Two Mechanical Resonators with Intracavity Squeezed Light

Contact Info

Product

Resources

About