Gravity Probe Spin: Prospects for measuring general-relativistic precession of intrinsic spin using a ferromagnetic gyroscope
| Autor: | Dmitry Budker, Yehuda B. Band, Peter W. Graham, Tao Wang, Alexander O. Sushkov, Pavel Fadeev, Derek F. Jackson Kimball |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Angular momentum
General relativity FOS: Physical sciences Electron Frame-dragging General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences 7. Clean energy General Relativity and Quantum Cosmology law.invention Physics::Geophysics law 0103 physical sciences ddc:530 010306 general physics Spin (physics) Geodetic effect Physics Quantum Physics 010308 nuclear & particles physics Gyroscope Quantum electrodynamics Physics::Space Physics Precession Condensed Matter::Strongly Correlated Electrons Quantum Physics (quant-ph) |
| Zdroj: | Physical review / D 103(4), 044056 (2021). doi:10.1103/PhysRevD.103.044056 Physical Review D |
| DOI: | 10.1103/PhysRevD.103.044056 |
| Popis: | An experimental test at the intersection of quantum physics and general relativity is proposed: measurement of relativistic frame dragging and geodetic precession using intrinsic spin of electrons. The behavior of intrinsic spin in spacetime dragged and warped by a massive rotating body is an experimentally open question, hence the results of such a measurement could have important theoretical consequences. Such a measurement is possible by using mm-scale ferromagnetic gyroscopes in orbit around the Earth. Under conditions where the rotational angular momentum of a ferromagnet is sufficiently small, a ferromagnet's angular momentum is dominated by atomic electron spins and is predicted to exhibit macroscopic gyroscopic behavior. If such a ferromagnetic gyroscope is sufficiently isolated from the environment, rapid averaging of quantum uncertainty via the spin-lattice interaction enables readout of the ferromagnetic gyroscope dynamics with sufficient sensitivity to measure both the Lense-Thirring (frame dragging) and de Sitter (geodetic precession) effects due to the Earth. 10 pages, 7 figures |
| Databáze: | OpenAIRE |
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