Measurements of spin properties of atomic systems in and out of equilibrium via noise spectroscopy

Abstract

We explore the applications of spin noise spectroscopy (SNS) for detection of the spin properties of atomic ensembles in and out of equilibrium. In SNS, a linearly polarized far-detuned probe beam on passing through an ensemble of atomic spins acquires the information of the spin correlations of the system which is extracted using its time-resolved Faraday-rotation noise. We measure various atomic, magnetic and sub-atomic properties as well as perform precision magnetometry using SNS in rubidium atomic vapor in thermal equilibrium. Thereafter, we manipulate the relative spin populations between different ground state hyperfine levels of rubidium by controlled optical pumping which drives the system out of equilibrium. We then apply SNS to probe such spin imbalance nonperturbatively. We further use this driven atomic vapor to demonstrate that SNS can have better resolution than typical absorption spectroscopy in detecting spectral lines in the presence of various spectral broadening mechanisms.

15 pages, 9 figures

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Cited by in corpus (14)

• Laser-written vapor cells for chip-scale atomic sensing and spectroscopy
• Probe thermometry with continuous measurements
• Transition frequency measurement of highly excited Rydberg states of 87Rb for a wide range of principal quantum numbers
• Enhancement of spin noise spectroscopy of rubidium atomic ensemble by using of the polarization squeezed light
• Spin noise spectroscopy of a noise-squeezed atomic state
• 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
• Observation of optical Rabi oscillations in transmission signal of atomic vapor under continuous-wave laser excitation
• Creation and dynamics of spin fluctuations in a noisy magnetic field
• A real time digital receiver for correlation measurements in atomic systems
• Anomalous high-density spin noise in a strongly interacting atomic vapor
• Fluctuations in Spin Dynamics Excited by Pulsed Light
• Doppler-Enhanced Quantum Magnetometry with thermal Rydberg atoms