Higher-order spin-noise spectroscopy of atomic spins in fluctuating external fields
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Nonlinear Studies and Theoretical Division
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). National High Magnetic Field Lab.
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division
Here, we discuss the effect of external noisy magnetic fields on mesoscopic spin fluctuations that can be probed in semiconductors and atomic vapors by means of optical spin-noise spectroscopy. We also show that conventional arguments of the law of large numbers do not apply to spin correlations induced by external fields, namely, the magnitude of the 4th-order spin cumulant grows as ~N2 with the number N of observed spins, i.e., it is not suppressed in comparison to the 2nd-order cumulant. Moreover, this allows us to design a simple experiment to measure the 4th-order cumulant of spin fluctuations in an atomic system near thermodynamic equilibrium and develop a quantitative theory that explains all observations.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1335612
- Alternate ID(s):
- OSTI ID: 1242608
- Report Number(s):
- LA-UR-15-28255; PLRAAN
- Journal Information:
- Physical Review A, Vol. 93, Issue 3; ISSN 2469-9926
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Spatiotemporal Spin Noise Spectroscopy
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journal | July 2019 |
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