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http://hdl.handle.net/2289/7911| Title: | Detection of spin coherence in cold atoms via Faraday rotation fluctuations |
| Authors: | Swar, Maheswar Roy, Dibyendu Bhar, Subhajit Roy, Sanjukta Chaudhuri, Saptarishi |
| Keywords: | cooling and traping spin coherence effects of atomic coherence on light propagation spin fluctuations |
| Issue Date: | 10-Dec-2021 |
| Publisher: | American Physical Society |
| Citation: | Physical Review Research, 2021, Vol. 3, Article No. 043171 |
| Abstract: | We report noninvasive detection of spin coherence in a collection of Raman-driven cold atoms using dispersive Faraday rotation fluctuation measurements, which opens possibilities of probing spin correlations in quantum gases and other similar systems. We demonstrate five orders of magnitude enhancement of the measured signal strength as compared to traditional spin noise spectroscopy with thermal atoms in equilibrium. Our observations are in good agreement with the comprehensive theoretical modeling of the driven atoms at various temperatures. The extracted spin relaxation rate of cold rubidium atoms with atom number density ∼109/cm3 is of the order of 3×103s−1 at 150 μK, two orders of magnitude less than 3×105s−1 of that of a thermal atomic vapor with atom number density ∼1012/cm3 at 373 K. |
| Description: | Open Access |
| URI: | http://hdl.handle.net/2289/7911 |
| Alternative Location: | https://arxiv.org/abs/2104.10473 https://doi.org/10.1103/PhysRevResearch.3.043171 https://ui.adsabs.harvard.edu/abs/2021PhRvR...3d3171S/abstract |
| Copyright: | 2021 American Physical Society |
| Appears in Collections: | Research Papers (TP) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2022_PhysRevResearch_Vol.3_p043171.pdf | Open Access | 3.2 MB | Adobe PDF | View/Open |
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