Thomas Zanon-Willette, Emeric de Clercq, Ennio Arimondo
Radio-frequency quantum engineering of spins is based on the dressing by a non resonant electromagnetic field. Radio-frequency dressing occurs also for the motion of particles, electrons or ultracold atoms, within a periodic spatial potential. The dressing, producing a renormalisation and also a freeze of the system energy, is described by different approaches, dressed atom, magnetic resonance semiclassical treatment, continued fraction solution of the Schr\"odinger equation. We compare those solutions and point out that the semiclassical treatment represents the most convenient tool to evaluate the tunneling renormalization of ultracold atoms.
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http://arxiv.org/abs/1302.2120
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