Active optical table tilt stabilization

Lewandowski, Charles W.; Knowles, T. D.; Etienne, Z. B.; D’Urso, Brian

doi:10.1063/5.0006916

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…In the inflated state air density fluctuations act differently onto the air springs and thereby can cause excessive table tilt at low frequencies, which could explain the excessive yaw excitation. Operating our experiment with inflated air springs will require an active tilt stabilization system 58 .…”

Section: Vibration Isolationmentioning

confidence: 99%

Measurement of Gravitational Coupling between Millimeter-Sized Masses

Westphal,

Hepach,

Pfaff

et al. 2020

Preprint

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We demonstrate gravitational coupling between two gold spheres of radius r ≈ 1 mm and mass m ≈ 90 mg. By periodically modulating the source mass position at a frequency f mod = 12.7 mHz we generate a time-dependent gravitational acceleration at the location of the test mass, which is measured off resonance in a miniature torsional balance configuration. Over an integration time of 350 hours the test mass oscillator enables measurements with a systematic accuracy of 4×10 −11 m/s 2 and a statistical precision of 4 × 10 −12 m/s 2 . This is sufficient to resolve the gravitational signal at a minimal surface distance of 400 µm between the two masses. We observe both linear and quadratic coupling, consistent in signal strength with a time-varying 1/r gravitational potential. Contributions of non-gravitational forces could be kept to less than 10 % of the observed signal. We expect further improvements to enable the isolation of gravity as a coupling force for objects well below the Planck mass. This opens the way for precision tests of gravity in a new regime of isolated microscopic source masses.

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Section: Vibration Isolationmentioning

confidence: 99%

Measurement of Gravitational Coupling between Millimeter-Sized Masses

Westphal,

Hepach,

Pfaff

et al. 2020

Preprint

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“…The fringe width of the interference pattern produced is sampled by sweeping φ by approximately ±500 µrad around φ = 0. Active stabilization of an optical table to less than 350 nrad of tilt noise has been demonstrated [71]. The fringe width could be reduced by increasing the magnet separation in the second oscillation.…”

Section: Discussionmentioning

confidence: 99%

Spin dynamical decoupling for generating macroscopic superpositions of a free-falling nanodiamond

2022

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Levitated nanodiamonds containing negatively charged nitrogen-vacancy centers (NV − ) have been proposed as a platform to generate macroscopic spatial superpositions. Requirements for this include having a long NV − spin coherence time, which necessitates formulating a dynamical decoupling strategy in which the regular spin flips do not cancel the growth of the superposition through the Stern-Gerlach effect in an inhomogeneous magnetic field. Here, we propose a scheme to place a 250-nm-diameter diamond in a superposition with spatial separation of over 250 nm, while incorporating dynamical decoupling. We achieve this by letting a diamond fall for 2.4 m through a magnetic structure, including 1.13 m in an inhomogeneous region generated by magnetic teeth.

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“…Following pioneering work by Ashkin and Dziedzic [18][19][20], levitated optomechanics has undergone substantial development in the past decade [21], with techniques now demonstrated to trap objects with diameters between ∼50 nm-10 µm using optical [22][23][24][25][26][27][28][29], magnetic [30][31][32][33], or RF [34][35][36] trapping fields. Due to the high isolation from thermal and environmental sources of noise possible in a high-vacuum environment, such objects have found applications to precise force sensing and accelerometry [25,[37][38][39][40][41], torque sensing [42][43][44][45], electric field sensing [46,47], and pressure sensing [48].…”

Section: Overview Of Optically Levitated Systemsmentioning

confidence: 99%

Searching for new physics using optically levitated sensors

Moore¹,

Geraci²

2021

Quantum Sci. Technol.

122

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We describe a variety of searches for new physics beyond the standard model of particle physics which may be enabled in the coming years by the use of optically levitated masses in high vacuum. Such systems are expected to reach force and acceleration sensitivities approaching (and possibly eventually exceeding) the standard quantum limit over the next decade. For new forces or phenomena that couple to mass, high precision sensing using objects with masses in the fg–ng range have significant discovery potential for new physics. Such applications include tests of fundamental force laws, searches for non-neutrality of matter, high-frequency gravitational wave detectors, dark matter searches, and tests of quantum foundations using massive objects.

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Active optical table tilt stabilization

Cited by 6 publications

References 10 publications

Measurement of Gravitational Coupling between Millimeter-Sized Masses

Measurement of Gravitational Coupling between Millimeter-Sized Masses

Spin dynamical decoupling for generating macroscopic superpositions of a free-falling nanodiamond

Searching for new physics using optically levitated sensors

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