Spin-alignment noise in atomic vapor
arXiv:1906.03163 · doi:10.1103/PhysRevResearch.2.012008
Abstract
In the conventional spin noise spectroscopy, the probe laser light monitors fluctuations of the spin orientation of a paramagnet revealed as fluctuations of its gyrotropy, i.e., circular birefringence. For spins larger than 1/2, there exists spin arrangement of a higher order---the spin alignment---which also exhibits spontaneous fluctuations. We show theoretically and experimentally that the alignment fluctuations manifest themselves as the noise of the linear birefringence. In a magnetic field, the spin-alignment fluctuations, in contrast to those of spin orientation, show up as the noise of the probe-beam ellipticity at the double Larmor frequency, with the most efficient geometry of its observation being the Faraday configuration with the light propagating along the magnetic field. We have detected the spin-alignment noise in a cesium-vapor cell probed at the wavelength of D2 line (852.35 nm). The magnetic-field and polarization dependence of the ellipticity noise are in full agreement with the developed theory.
arXiv comment6 pages, 4 figures, figure restyle, new references
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Cited by in corpus (13)
- Noise analysis of the atomic superheterodyne receiver based on flat-top laser beams
- Inter-species spin-noise correlations in hot atomic vapors
- Spin noise spectroscopy of an alignment-based atomic magnetometer
- Optical Resonance Shift Spin Noise Spectroscopy
- Acoustic frequency atomic spin oscillator in the quantum regime
- Nonlinear spectroscopy of high-spin fluctuations
- Birefringence and dichroism effects in the spin noise spectra of a spin-1 system
- Raman scattering model of the spin noise
- Spin noise spectroscopy of optical light shifts
- Anomalous light-induced broadening of the spin-noise resonance in cesium vapor
- Optically driven spin-alignment precession
- Creation and dynamics of spin fluctuations in a noisy magnetic field
- Anomalous high-density spin noise in a strongly interacting atomic vapor