Title:	Measurements of spin properties of atomic systems in and out of equilibrium via noise spectroscopy
Authors:	Swar, Maheswar Roy, Dibyendu D, Dhanalakshmi Chaudhuri, Saptarishi Roy, Sanjukta Ramachandran, Hema
Issue Date:	26-Nov-2018
Publisher:	Optical Society of America
Citation:	Optics Express, 2018, Vol. 26, p 32168-32183
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 non-perturbatively. 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.
Description:	Open Access
URI:	http://hdl.handle.net/2289/7105
ISSN:	1094-4087 (online)
Alternative Location:	https://arxiv.org/abs/1809.02321 https://doi.org/10.1364/OE.26.032168
Copyright:	2018 Optical Society of America
Appears in Collections:	Research Papers (LAMP)

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.