High- Q Milligram-Scale Monolithic Pendulum for Quantum-Limited Gravity Measurements

Seth B. Cataño-Lopez, Jordy G. Santiago-Condori, Keiichi Edamatsu, Nobuyuki Matsumoto

研究成果: Article査読

16 被引用数 (Scopus)


We present the development of a high-Q monolithic silica pendulum weighing 7 milligram. The measured Q value for the pendulum mode at 2.2 Hz was 2.0×106. To the best of our knowledge this is the lowest dissipative milligram-scale mechanical oscillator to date. By employing this suspension system, the optomechanical displacement sensor for gravity measurements we recently reported in Matsumoto et al. [Phys. Rev. Lett. 122, 071101 (2019)PRLTAO0031-900710.1103/PhysRevLett.122.071101] can be improved to realize quantum-noise-limited sensing at several hundred hertz. 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 milligram-scale oscillators in quantum states, as well as improving the sensitivity of gravitational-wave detectors.

ジャーナルPhysical review letters
出版ステータスPublished - 2020 6月 5

ASJC Scopus subject areas

  • 物理学および天文学(全般)


「High- Q Milligram-Scale Monolithic Pendulum for Quantum-Limited Gravity Measurements」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。