Spin-noise correlations and spin-noise exchange driven by low-field spin-exchange collisions

TL;DR

This paper reports the experimental observation and theoretical explanation of spin-noise exchange between atomic species at low magnetic fields, revealing how spin-exchange collisions induce correlations that transfer noise between species.

Contribution

It introduces the concept of spin-noise exchange driven by spin-exchange collisions and provides experimental evidence and theoretical understanding of this phenomenon.

Findings

Increased total spin-noise power at low magnetic fields.

Observation of two-species spin-noise resonances overlapping.

Spin-exchange collisions induce correlations leading to noise transfer.

Abstract

The physics of spin exchange collisions have fueled several discoveries in fundamental physics and numerous applications in medical imaging and nuclear magnetic resonance. We here report on the experimental observation and theoretical justification of spin-noise exchange, the transfer of spin-noise from one atomic species to another. The signature of spin-noise exchange is an increase of the total spin-noise power at low magnetic fields, on the order of 1 mG, where the two-species spin-noise resonances overlap. The underlying physical mechanism is the two-species spin-noise correlation induced by spin-exchange collisions.