Nonlinear amplification of small spin precession using long-range dipolar interactions

M. P. Ledbetter, I. M. Savukov, M. V. Romalis

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

In measurements of small signals using spin precession the precession angle usually grows linearly in time. We show that a dynamic instability caused by spin interactions can lead to an exponentially growing spin-precession angle, amplifying small signals and raising them above the noise level of a detection system. We demonstrate amplification by a factor of greater than 8 of a spin-precession signal due to a small magnetic field gradient in a spherical cell filled with hyperpolarized liquid 129Xe. This technique can improve the sensitivity in many measurements that are limited by the noise of the detection system, rather than the fundamental spin-projection noise.

Original languageEnglish (US)
Article number060801
JournalPhysical review letters
Volume94
Issue number6
DOIs
StatePublished - Feb 18 2005

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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