Simultaneous cavity cooling of all six degrees of freedom of a levitated nanoparticle

Pontin, A.; Fu, Hongchang; Toroš, Marko; Monteiro, T. S.; Barker, P. F.

doi:10.1038/s41567-023-02006-6

Cited by 23 publications

(5 citation statements)

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“…However, these mechanical modes have frequencies well above either the centre-of-mass motion of the nanosphere or the atom-nanosphere bound state motion and therefore we expect that these will have little effect on the processes studied here. Future work could however additionally explore the sympathetic cooling of the internal temperature of levitated nanospheres and also the rotational motion of non-spherical particles [49]. The sympathetic cooling method studied here for the centre-of-mass motion may offer a very general method for cooling all degrees-of-freedom of a levitated nanoparticle, particularly for multiple co-trapped particles.…”

Section: Discussionmentioning

confidence: 99%

A levitated atom-nanosphere hybrid quantum system

Hopper,

Barker

2024

New J. Phys.

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Near-field, radially symmetric optical potentials centred around a levitated nanosphere can be used for sympathetic cooling and for creating a bound nanosphere-atom system analogous to a large molecule. We demonstrate that the long range, Coulomb-like potential produced by a single blue detuned field increases the collisional cross-section by eight orders of magnitude, allowing fast sympathetic cooling of a trapped nanosphere to microKelvin temperatures using cold atoms. By using two optical fields to create a combination of repulsive and attractive potentials, we demonstrate that a cold atom can be bound to a nanosphere creating a new levitated hybrid quantum system suitable for exploring quantum mechanics with massive particles.

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Section: Discussionmentioning

confidence: 99%

A levitated atom-nanosphere hybrid quantum system

Hopper,

Barker

2024

New J. Phys.

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“…These works were an important step toward the experimental realization of torsional cooling of nonspherical objects based on the polarization state rather than the spatial degrees of freedom, as had been proposed theoretically 53 , 54 . The most recent advances bring us even closer to the sought-after ground-state cooling of all 6 degrees of freedom of a levitated nonspherical nanoparticle 55 …”

Section: Wireless Optical Approachesmentioning

confidence: 94%

“…53,54 The most recent advances bring us even closer to the sought-after ground-state cooling of all 6 degrees of freedom of a levitated nonspherical nanoparticle. 55 Finally, the wireless situation involving an optical torque that results from the interaction between the spin and orbital degrees of freedom has also been demonstrated experimentally. This was reported in Ref.…”

Section: Wireless Optical Approachesmentioning

confidence: 97%

Torsion pendulum driven by the angular momentum of light: Beth’s legacy continues

Brasselet

2023

Adv. Photon.

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.The optical angular momentum is ubiquitous to the science of light, especially whenever the polarization state and the spatial distribution of the phase are involved, which are most often associated with the spin and orbital parts of the total angular momentum, respectively. Notably, the independent introduction of these two contributions to the total optical angular momentum was accompanied by suggestions regarding the possible detection of their mechanical effects using a torsion pendulum. Today, the classical and quantum mechanical aspects of spin and orbital angular momentum of light and their mutual coupling remain active research topics offering exciting perspectives for photonic technologies. Our brief historical overview shows how the torsion pendulum has accompanied scientific advances on mechanical effects based on the angular degrees of freedom of light since Beth’s pioneering contribution published in 1935.

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“…Levitodynamics, which deals with controlling the mechanical motion of massive oscillators in vacuum [2,4], has made remarkable headway towards multiple-particle systems, with demonstrations of cooling [5] and short-range coupling [6][7][8][9][10][11] between nanoparticles levitated in free space. Furthermore, recent experiments with single particles in optical tweezers have established exquisite control over rotational dynamics [12][13][14][15], and achieved quantum ground-state cooling of mechanical motion [16][17][18][19][20][21]. One of the next pivotal milestones towards macroscopic quantum physics is to entangle multiple particles via optical forces.…”

Section: Introductionmentioning

confidence: 99%

Cavity-mediated long-range interactions in levitated optomechanics

Novotny,

Vijayan,

Piotrowski

et al. 2023

Preprint

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The ability to engineer cavity-mediated interactions has emerged as a powerful tool for the generation of non-local correlations and the investigation of non-equilibrium phenomena in many-body systems. Levitated optomechanical systems have recently entered the multi-particle regime, with promise for using arrays of massive strongly coupled oscillators for exploring complex interacting systems and sensing. Here, by combining advances in multi-particle optical levitation and cavity-based quantum control, we demonstrate, for the first time, programmable cavity-mediated interactions between nanoparticles in vacuum. The interaction is mediated by photons scattered by spatially separated particles in a cavity, resulting in strong coupling (Gzz/Ωz = 0.238 ± 0.005) that does not decay with distance within the cavity mode volume. We investigate the scaling of the interaction strength with cavity detuning and inter-particle separation, and demonstrate the tunability of interactions between different mechanical modes. Our work paves the way towards exploring many-body effects in nanoparticle arrays with programmable cavity-mediated interactions, generating entanglement of motion, and using interacting particle arrays for optomechanical sensing

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Simultaneous cavity cooling of all six degrees of freedom of a levitated nanoparticle

Cited by 23 publications

References 50 publications

A levitated atom-nanosphere hybrid quantum system

A levitated atom-nanosphere hybrid quantum system

Torsion pendulum driven by the angular momentum of light: Beth’s legacy continues

Cavity-mediated long-range interactions in levitated optomechanics

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