Enhancement of On-Site Interactions of Tunnelling Ultracold Atoms in Optical Potentials using Radio-Frequency Dressing

Abstract

We show how it is possible to more than double the on-site interaction energy of neutral atoms in optical potentials by the technique of radio-frequency (rf) dressing, while maintaining interwell dynamics. We calculate Bose-Hubbard parameters for rf dressed optical lattices and arrays of rf dressed dipole traps. We show that decreasing the distance between wells, by the interpolation of wells confining different m_F states, increases the interaction energy more than decreasing the height of the classically forbidden region between existing wells. The schemes we propose have negligible Landau-Zener losses caused by atomic motion; this was a dominant effect in the first experimental demonstration of the modification of an optical potential by radio-frequency dressing.

arXiv comment5 pages, 2 figures, 6 subfigures

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Cited by in corpus (10)

• Maximally localized Wannier functions: Theory and applications
• Subwavelength-width optical tunnel junctions for ultracold atoms
• Trapping atoms with radio-frequency adiabatic potentials
• Macroscopic Quantum Tunneling Escape of Bose-Einstein Condensates
• Coherent control of atomic transport in spinor optical lattices
• Dark-State Optical Potential Barriers with Nanoscale Spacing
• Observations of $\lambda /4$ structure in a low-loss radiofrequency-dressed optical lattice
• RF dressed atoms beyond the linear Zeeman effect
• Inelastic losses in radiofrequency-dressed traps for ultracold atoms
• An effective scalar magnetic interaction for resonantly trapped atoms