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arXiv · 1408.5399

Cross-correlation spin noise spectroscopy of heterogeneous interacting spin systems

Dibyendu Roy·Luyi Yang·Scott A. Crooker·Nikolai A. Sinitsyn
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Abstract

We develop and apply a minimally invasive approach for characterization of inter-species spin interactions by detecting spin fluctuations alone. We consider a heterogeneous two-component spin ensemble in thermal equilibrium that interacts via binary exchange coupling, and we determine cross-correlations between the intrinsic spin fluctuations exhibited by the two species. Our theoretical predictions are experimentally confirmed using `two-color' optical spin noise spectroscopy on a mixture of interacting Rb and Cs alkali vapors. The results allow us to explore the rates of spin exchange and total spin relaxation under conditions of strict thermodynamic equilibrium.

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Dibyendu Roy, Luyi Yang, Scott A. Crooker, Nikolai A. Sinitsyn. 2014-08-22. Cross-correlation spin noise spectroscopy of heterogeneous interacting spin systems. https://arxiv.org/abs/1408.5399

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