Ultracold atoms in multiple-radiofrequency dressed adiabatic potentials

Abstract

We present the first experimental demonstration of a multiple-radiofrequency dressed potential for the configurable magnetic confinement of ultracold atoms. We load cold ${}^{87}$Rb atoms into a double well potential with an adjustable barrier height, formed by three radiofrequencies applied to atoms in a static quadrupole magnetic field. Our multiple-radiofrequency approach gives precise control over the double well characteristics, including the depth of individual wells and the height of the barrier, and enables reliable transfer of atoms between the available trapping geometries. We have characterised the multiple-radiofrequency dressed system using radiofrequency spectroscopy, finding good agreement with the eigenvalues numerically calculated using Floquet theory. This method creates trapping potentials that can be reconfigured by changing the amplitudes, polarizations and frequencies of the applied dressing fields, and easily extended with additional dressing frequencies.

16 pages, 6 figures

References in corpus (11)

• Matter-wave interferometry in a double well on an atom chip
• Emergence of coherence in a uniform quasi-two-dimensional Bose gas
• Radio-frequency dressed state potentials for neutral atoms
• Ultracold atoms confined in rf-induced two-dimensional trapping potentials
• Ultracold atoms in radio-frequency-dressed potentials beyond the rotating wave approximation
• Manipulation of ultracold atoms in dressed adiabatic radio frequency potentials
• A two-dimensional quantum gas in a magnetic trap
• Trapping atoms with radio-frequency adiabatic potentials
• Non-adiabatic losses from radio-frequency dressed cold atom traps: beyond the Landau-Zener model
• Species-selective confinement of atoms dressed with multiple radiofrequencies
• Adiabatic potentials using multiple radio frequencies

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