Magnetic resonance studies of dressed atoms

Michael Mehring, Gerhard Wäckerle

Thomas E. Barrett, Nathan G. Woodard, Gregory P. Lafyatis

We discuss and demonstrate the driving of magnetic resonance transitions between members of a dressed atom doublet. A simple extension of existing dressed atom theory, describes the experimental results reasonably well. We mention low intensity, bare atom interpretations of the experiment and conclude with suggestions for further studies and possible applications.

Piers Coleman

G. Bevilacqua, V. Biancalana, Yordanka V. Dancheva +1 more

We study the possibility of counteracting the line-broadening of atomic magnetic resonances due to inhomogeneities of the static magnetic field by means of spatially dependent magnetic dressing driven by an alternating field that oscillates much faster than the Larmor precession frequency. We demonstrate that an intrinsic resonance linewidth of 25 Hz that has been broadened up to hundreds Hz by a magnetic field gradient, can be recovered by the application of appropriate inhomogeneous dressing field. The findings of our experiments may have immediate and important implications, because they facilitate the use of atomic magnetometers as robust, high sensitivity detectors in ultra-low-field NMR imaging.

Zhi Liang, Xu‐xing Geng, Pan-li Qi +4 more

We theoretically and experimentally investigate the laser-detected magnetic resonance spectra dressed by a radio-frequency magnetic field in F g = 4 of D1 line of cesium atoms. The analytical expression of the transmission spectrum for magnetic resonance dressed by a radio-frequency magnetic field is derived and has substantial agreement with the transmission spectra observed in the experiment. The theoretical prediction of the ratio of the amplitudes of the two sidebands with the detuning is basically consistent with the experimental data, which confirms the validity of the analytical expression. The separation between the two sidebands under resonance shows a highly linear proportion to the amplitude of the dressing field, which may provide a useful scheme for the measurement of radio-frequency magnetic field and magnetic imaging.

Piers Coleman, P. L. Knight