Optomechanical torque magnetometry

Wu, Marcelo; Wu, Nathanael L. Y.; Firdous, Tayyaba; Sani, Fatemeh Fani; Losby, Joseph; Freeman, M. R.; Barclay, Paul E.

doi:10.1364/cleo_si.2016.stu4e.1

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…3, showing the alignment reduction due to an external torque of magnitude N ext orthogonal to the trapping laser polarization. The numerical simulations of the torqueinduced dynamics, involving transitions between 360,000 angular momentum states (see Materials and Methods), show that torques on the order of 10 −30 Nm are observable, eight orders of magnitude smaller than the levitated [28,29] or solid-state-integrated [32] setups considered so far.…”

Section: Sensing Applicationsmentioning

confidence: 95%

“…The proposed scheme requires cavity-or feedback-cooling of the nanoparticle rotation [30,31] to below a Kelvin, while it is independent of its center-of-mass temperature. An observation of orientational quantum revivals with nanorotors would substantially advance macroscopic superposition tests, provide the first experimental test of the angular momentum quantization of massive objects, and enable quantum coherent gyroscopic torque sensing with the potential of improving state-of-the-art devices [29,32] by many orders of magnitude.…”

Section: Introductionmentioning

confidence: 99%

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Probing Macroscopic Quantum Superpositions with Nanorotors

Stickler,

Papendell,

Kuhn

et al. 2018

Preprint

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Whether quantum physics is universally valid is an open question with farreaching implications. Intense research is therefore invested into testing the quantum superposition principle with ever heavier and more complex objects. Here we propose a radically new, experimentally viable route towards studies at the quantum-to-classical borderline by probing the orientational quantum revivals of a nanoscale rigid rotor. The proposed interference experiment testifies a macroscopic superposition of all possible orientations. It requires no diffraction grating, uses only a single levitated particle, and works with moderate motional temperatures under realistic environmental conditions. The first exploitation of quantum rotations of a massive object opens the door to new tests of quantum physics with submicron particles and to quantum gyroscopic torque sensors, holding the potential to improve state-of-the art devices by many orders of magnitude.

show abstract

Section: Sensing Applicationsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Probing Macroscopic Quantum Superpositions with Nanorotors

Stickler,

Papendell,

Kuhn

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…The coupled optical and mechanical degrees‐of‐freedom [ 24 ] allow detections of nanomechanical motion [ 25,26 ] toward force sensing, [ 27 ] radio wave detection, [ 28 ] and magnetic susceptibility measurements. [ 29 ]…”

Section: Introductionmentioning

confidence: 99%

A Chip‐Scale Oscillation‐Mode Optomechanical Inertial Sensor Near the Thermodynamical Limits

Huang

Flores

et al. 2020

Laser & Photonics Reviews

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Modern navigation systems integrate the global positioning system (GPS) with an inertial navigation system (INS), which complement each other for correct attitude and velocity determination. The core of the INS integrates accelerometers and gyroscopes used to measure forces and angular rate in the vehicular inertial reference frame. With the help of gyroscopes and by integrating the acceleration to compute velocity and distance, precision and compact accelerometers with sufficient accuracy can provide small-error location determination. Solid-state implementations, through coherent readout, can provide a platform for high performance acceleration detection. In contrast to prior accelerometers using piezoelectric or capacitive readout techniques, optical readout provides narrow-linewidth high-sensitivity laser detection along with low-noise resonant optomechanical transduction near the thermodynamical limits. Here an optomechanical inertial sensor with an 8.2 µg Hz −1/2 velocity random walk (VRW) at an acquisition rate of 100 Hz and 50.9 µg bias instability is demonstrated, suitable for applications, such as, inertial navigation, inclination sensing, platform stabilization, and/or wearable device motion detection. Driven into optomechanical sustained-oscillation, the slot photonic crystal cavity provides radio-frequency readout of the optically-driven transduction with an enhanced 625 µg Hz −1 sensitivity. Measuring the optomechanically-stiffened oscillation shift, instead of the optical transmission shift, provides a 220× VRW enhancement over pre-oscillation mode detection.

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Optomechanical torque magnetometry

Cited by 2 publications

References 7 publications

Probing Macroscopic Quantum Superpositions with Nanorotors

Probing Macroscopic Quantum Superpositions with Nanorotors

A Chip‐Scale Oscillation‐Mode Optomechanical Inertial Sensor Near the Thermodynamical Limits

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