Origin of Pure Spin Superradiance

Details Origin of Pure Spin Superradiance Origin of Pure Spin Superradiance

1997-11-23

arxiv.org/abs/cond-mat/9711237v1

Phys. Rev. Lett. 75 (1995) 3000-3003

Physics

Condensed Matter

Statistical Mechanics

1 file, 13 pages, RevTex

Scientific paper

10.1103/PhysRevLett.75.3000

The question addressed in this paper is: What originates pure spin superradiance in a polarized spin system placed inside a resonator? The term "pure" means that no initial coherence is imposed on spins, and its appearance manifests a purely self-organized collective effect. The consideration is based on a microscopic model with dipole spin interactions. An accurate solution of evolution equations is given. The results show that the resonator Nyquist noise does not play, contrary to the common belief, any role in starting spin superradiance, but the emergence of the latter is initiated by local spin fluctuations. The decisive role of nonsecular dipole interactions is stressed.

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