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Harmonic Fine Tuning and Triaxial Spatial Anisotropy of Dressed Atomic Spins

Abstract : The addition of a weak oscillating field modifying strongly dressed spins enhances and enriches the system quantum dynamics. Through low-order harmonic mixing, the bichromatic driving generates additional rectified static field acting on the spin system. The secondary field allows for a fine tuning of the atomic response and produces effects not accessible with a single dressing field, such as a spatial triaxial anisotropy of the spin coupling constants and acceleration of the spin dynamics. This tuning-dressed configuration introduces an extra handle for the system full engineering in quantum control applications. Tuning amplitude, harmonic content, spatial orientation, and phase relation are control parameters. A theoretical analysis, based on perturbative approach, is experimentally tested by applying a bichromatic radiofrequency field to an optically pumped Cs atomic vapour. The theoretical predictions are precisely confirmed by measurements performed with tuning frequencies up to the third harmonic.
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Submitted on : Tuesday, July 12, 2022 - 7:42:05 AM
Last modification on : Tuesday, August 2, 2022 - 4:32:55 AM


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Giuseppe Bevilacqua, Valerio Biancalana, Antonio Vigilante, Thomas Zanon-Willette, Ennio Arimondo. Harmonic Fine Tuning and Triaxial Spatial Anisotropy of Dressed Atomic Spins. Physical Review Letters, 2020, 125, ⟨10.1103/PhysRevLett.125.093203⟩. ⟨insu-03718035⟩



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