Coupled dynamics of an optically levitated nanodumbbell

Ju, Peng; Bang, Jaehoon; Seberson, T.; Ahn, Jonghoon; Xu, Zhujing; Gao, Xingyu; Robicheaux, F.; Li, Tongcang

doi:10.1364/ls.2020.lth2g.3

Cited by 2 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Within the framework of the washboard potentials and consideration of the initial librational/rotational kinetic energy of nanoparticles, hysteresis-loop bistabilities are straightforwardly understood. Our observations establish essential foundations for developing quantum precision measurement techniques 1,13,50 and exploring inherent frontier physical problems in mesoscopic lasermatter interactions 6,21,51 with respect to the rotational degrees of freedom. The power of the 532 nm detection laser is maintained at a substantially lower level (~10 mW) than that of the 1064 nm trapping laser (~60-120 mW) to ensure that the control exerted by the 1064 nm trapping laser over the levitated nanoparticle is not compromised.…”

Section: (D) a Reduction In Critical Ellipticitiesmentioning

confidence: 76%

Investigating and Controlling the Libration and Rotation Dynamics of Nanoparticles in an Optomechanical System

Li,

He,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

In optomechanical systems, the libration and rotation of nanoparticles provide profound insights for ultrasensitive torque measurements and macroscopic quantum superpositions. The achievements include transitioning the libration to the rotation up to 6 GHz and cooling the libration to millikelvin temperatures. Libration and rotation are driven by restoring and constant optical torques, respectively. However, the transition mechanisms between these two states warrant further exploration. From this perspective, in this study, monitoring lateral-scattered light enables real-time observation of the libration/rotation transitions and associated hysteresis as the ellipticities of trapping laser fields are varied. By calculating optical torques and solving the Langevin equation, the transitions are linked to the balance between anisotropic-polarization-induced sinusoidal optical torques and constant torques, and absorption is identified as the main contributor to constant torques. These findings enable direct weak torque sensing and precise nanoparticle control at rotational degrees, facilitating the study of quantum effects such as nonadiabatic phase shifts and macroscopic quantum superpositions, and thereby enriching quantum optomechanics research.

show abstract

Section: (D) a Reduction In Critical Ellipticitiesmentioning

confidence: 76%

Investigating and Controlling the Libration and Rotation Dynamics of Nanoparticles in an Optomechanical System

Li,

He,

Wang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Recently, the center-of-mass (CoM) motion of levitated nanoparticles in high vacuum has been cooled to the quantum regime [12][13][14] . Unlike tethered oscillators, levitated particles can also exhibit rotation [15][16][17][18][19][20][21][22] , which is intrinsically nonlinear 23,24 . Beyond rigid-body motion, levitated particles can host embedded spin qubits to provide more functionalities 25,26 .…”

mentioning

confidence: 99%

Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum

Jin,

Shen,

et al. 2024

Nat Commun

View full text Add to dashboard Cite

Levitated diamond particles in high vacuum with internal spin qubits have been proposed for exploring macroscopic quantum mechanics, quantum gravity, and precision measurements. The coupling between spins and particle rotation can be utilized to study quantum geometric phase, create gyroscopes and rotational matter-wave interferometers. However, previous efforts in levitated diamonds struggled with vacuum level or spin state readouts. To address these gaps, we fabricate an integrated surface ion trap with multiple stabilization electrodes. This facilitates on-chip levitation and, for the first time, optically detected magnetic resonance measurements of a nanodiamond levitated in high vacuum. The internal temperature of our levitated nanodiamond remains moderate at pressures below 10−5 Torr. We have driven a nanodiamond to rotate up to 20 MHz (1.2 × 109 rpm), surpassing typical nitrogen-vacancy (NV) center electron spin dephasing rates. Using these NV spins, we observe the effect of the Berry phase arising from particle rotation. In addition, we demonstrate quantum control of spins in a rotating nanodiamond. These results mark an important development in interfacing mechanical rotation with spin qubits, expanding our capacity to study quantum phenomena.

show abstract

Coupled dynamics of an optically levitated nanodumbbell

Abstract: We observe the coupled dynamics of both translational motion and torsional vibration for a levitated nanodumbbell at high vacuum. We also report cooling multiple degrees of freedom of the levitated nanodumbbell.

Cited by 2 publications

References 2 publications

Investigating and Controlling the Libration and Rotation Dynamics of Nanoparticles in an Optomechanical System

Investigating and Controlling the Libration and Rotation Dynamics of Nanoparticles in an Optomechanical System

Quantum control and Berry phase of electron spins in rotating levitated diamonds in high vacuum

Contact Info

Product

Resources

About