Characterization of a double torsion pendulum used to detect spin-induced torque based on Beth's experiment
| Autor: | Atsushi Hatakeyama, Runa Yasuda |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Angular momentum Quantum Physics Photon Classical Physics (physics.class-ph) FOS: Physical sciences Physics - Classical Physics Noise (electronics) Vibration Quantum electrodynamics Torsion pendulum clock Torque Sensitivity (control systems) Spin (physics) Quantum Physics (quant-ph) Instrumentation Optics (physics.optics) Physics - Optics |
| Popis: | We characterized a double torsion pendulum system, including measurements of the photon-spin-induced torque. Our experimental strategy was similar to that used in Beth's experiment, which was performed in 1936 to measure photon-spin-induced torque using forced oscillation caused by polarization modulation of light incident on a suspended object. Through simple passive isolation of the suspended object from external vibration noise, the achieved torque sensitivity was 2 x 10^{-17} N m in a measurement time of 10^4 s, which is close to the thermal noise limit and one order smaller than the minimum torque measured in Beth's experiment. The observed spin-induced torque exerted on the light-absorbing optics is consistent with the angular momentum transfer of hbar per photon. 13 pages, 6 figures. Major revision. Journal accepted manuscript |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|