Alkali-Metal Spin Maser

W. Chalupczak and P. Josephs-Franks
Phys. Rev. Lett. 115, 033004 – Published 16 July 2015
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Abstract

Quantum measurement is a combination of a read-out and a perturbation of the quantum system. We explore the nonlinear spin dynamics generated by a linearly polarized probe beam in a continuous measurement of the collective spin state in a thermal alkali-metal atomic sample. We demonstrate that the probe-beam-driven perturbation leads, in the presence of indirect pumping, to complete polarization of the sample and macroscopic coherent spin oscillations. As a consequence of the former we report observation of spectral profiles free from collisional broadening. Nonlinear dynamics is studied through exploring its effect on radio frequency as well as spin noise spectra.

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  • Received 10 February 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.033004

Published by the American Physical Society

Authors & Affiliations

W. Chalupczak and P. Josephs-Franks

  • National Physical Laboratory, Hampton Road, Teddington TW11 0LW, United Kingdom

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Issue

Vol. 115, Iss. 3 — 17 July 2015

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