High Q mg-scale monolithic pendulum for quantum-limited gravity measurements

Abstract

We present the development of a high $Q$ monolithic silica pendulum weighing 7 mg. The measured $Q$ value for the pendulum mode at 2.2 Hz was $2.0\times 10^6$. To the best of our knowledge this is the lowest dissipative mg-scale mechanical oscillator to date. By employing this suspension system, the optomechanical displacement sensor for gravity measurements we recently reported in Phys. Rev. Lett. 122, 071101 (2019) can be improved to realize quantum-noise-limited sensing at several hundred Hz. In combination with the optical spring effect, the amount of intrinsic dissipation measured in the pendulum mode is enough to satisfy requirements for measurement-based quantum control of a massive pendulum confined in an optical potential. This paves the way for not only testing dark matter via quantum-limited force sensors, but also Newtonian interaction in quantum regimes, namely, between two mg-scale oscillators in quantum states, as well as improving the sensitivity of gravitational-wave detectors.

arXiv comment5 pages, 3 figures

References in corpus (27)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Cavity Optomechanics
• Models of Wave-function Collapse, Underlying Theories, and Experimental Tests
• Interferometer design of the KAGRA gravitational wave detector
• Radiation-pressure cooling and optomechanical instability of a micro-mirror
• Conversion of conventional gravitational-wave interferometers into QND interferometers by modifying their input and/or output optics
• The Sensitivity of the Advanced LIGO Detectors at the Beginning of Gravitational Wave Astronomy
• Measurement-based quantum control of mechanical motion
• Ultra-coherent nanomechanical resonators via soft clamping and dissipation dilution
• An all-optical trap for a gram-scale mirror
• Macroscopic Quantum Mechanics: Theory and Experimental Concepts of Optomechanics
• Dark Matter Direct Detection with Accelerometers
• Optical dilution and feedback cooling of a gram-scale oscillator to 6.9 mK
• A classical channel model for gravitational decoherence
• Entanglement of macroscopic test masses and the Standard Quantum Limit in laser interferometry
• A micromechanical proof-of-principle experiment for measuring the gravitational force of milligram masses
• Frequency and surface dependence of the mechanical loss in fused silica
• Frequency-dependent rigidity in large-scale interferometric gravitational-wave detectors
• Appearance and disappearance of quantum correlations in measurement-based feedback control of a mechanical oscillator
• Demonstration of displacement sensing of a mg-scale pendulum for mm- and mg- scale gravity measurements
• Atto-Nm Torque Sensing with a Macroscopic Optomechanical Torsion Pendulum
• Coherent Cancellation of Photothermal Noise in GaAs/Al${}_{0.92}$Ga${}_{0.08}$As Bragg Mirrors
• Precise Measurement of Laser Power using an Optomechanical System
• 5-mg suspended mirror driven by measurement-induced back-action
• Quantum nondemolition measurement of optical field fluctuations by optomechanical interaction
• An optically trapped mirror for reaching the standard quantum limit
• Direct measurement of the optical trap-induced decoherence

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• Using an atom interferometer to infer gravitational entanglement generation
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• Prospects for observing gravitational forces between nonclassical mechanical oscillators
• Mechanical dissipation below 1$\mu$Hz with a cryogenic diamagnetic-levitated micro-oscillator
• Quantum sensing with milligram scale optomechanical systems
• Generating quantum entanglement between macroscopic objects with continuous measurement and feedback control
• Leggett-Garg inequalities for testing quantumness of gravity
• Non-Gaussian entanglement in gravitating masses: the role of cumulants
• Semi-classical gravity phenomenology under the causal-conditional quantum measurement prescription
• Perspectives of measuring gravitational effects of laser light and particle beams
• Enhancement of quantum gravity signal in an optomechanical experiment
• Feasible generation of gravity-induced entanglement by using optomechanical systems
• Passive Laser Power Stabilization via an Optical Spring
• Quantum signature of gravity in optomechanical systems with conditional measurement
• Field-induced entanglement in spatially superposed objects
• Imaging based feedback cooling of a levitated nanoparticle
• Quantum uncertainty of gravitational field and entanglement in superposed massive particles
• Effective description of a suspended mirror coupled to cavity light -Limitations of Q-enhancement due to normal mode splitting by an optical spring-
• Exponentially enhanced gravitationally induced entanglement between quantum systems with a two-phonon drive
• Improving force sensitivity by amplitude measurement of light reflected from a detuned optomechanical cavity
• Enhanced Gravitational Entanglement via Modulated Optomechanics
• The Role of Quantum Measurements when Testing the Quantum Nature of Gravity
• Quantumness of gravitational field: A perspective on monogamy relation
• First result for testing semiclassical gravity effect with a torsion balance
• Theoretical Study of the Squeezed-Light-Enhanced Sensitivity to Gravity-Induced Entanglement via Finite-Time Analysis