Nuclear spin gyroscope based on an atomic comagnetometer

T. W. Kornack, R. K. Ghosh, M. V. Romalis

Research output: Contribution to journalArticlepeer-review

374 Scopus citations


We describe a nuclear spin gyroscope based on an alkali-metal-noble-gas comagnetometer. Optically pumped alkali-metal vapor is used to polarize the noble-gas atoms and detect their gyroscopic precession. Spin precession due to magnetic fields as well as their gradients and transients can be cancelled in this arrangement. The sensitivity is enhanced by using a high-density alkali-metal vapor in a spin-exchange relaxation free regime. With a K-He3 comagnetometer we demonstrate rotation sensitivity of 5×10-7rads-1Hz-1/2, equivalent to a magnetic field sensitivity of 2.5fT/Hz1/2. The rotation signal can be increased by a factor of 10 using Ne21 with a smaller magnetic moment. The comagnetometer is also a promising tool in searches for anomalous spin couplings beyond the standard model.

Original languageEnglish (US)
Article number230801
JournalPhysical review letters
Issue number23
StatePublished - Dec 2 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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