Synchronous Optical Pumping of Quantum Revival Beats for Atomic Magnetometery

Abstract

We observe quantum beats with periodic revivals due to non-linear spacing of Zeeman levels in the ground state of potassium atoms and demonstrate their synchronous optical pumping by double modulation of the pumping light at the Larmor frequency and the revival frequency. We show that synchronous pumping increases the degree of spin polarization by a factor of 4. As a practical example, we explore the application of this double-modulation technique to atomic magnetometers operating in the geomagnetic field range and find that it can increase the sensitivity and reduce magnetic field orientation-dependent measurement errors endemic to alkali-metal magnetometers.

4 pages

References in corpus (5)

• Quantum wave packet revivals
• Nonlinear magneto-optical rotation with frequency-modulated light in the geophysical field range
• Dynamic effects in nonlinear magneto-optics of atoms and molecules
• Comparison of discharge lamp and laser pumped cesium magnetometers
• Field-free two-direction alignment alternation of linear molecules by elliptic laser pulses

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