Ultracold atoms in radio-frequency-dressed potentials beyond the rotating wave approximation

Abstract

We study dressed Bose-Einstein condensates in an atom chip radio-frequency trap. We show that in this system sufficiently strong dressing can be achieved to cause the widely used rotating wave approximation (RWA) to break down. We present a full calculation of the atom - field coupling which shows that the non-RWA contributions quantitatively alter the shape of the emerging dressed adiabatic potentials. The non-RWA contributions furthermore lead to additional allowed transitions between dressed levels. We use RF spectroscopy of Bose-Einstein condensates trapped in the dressed state potentials to directly observe the transition from the RWA to the beyond-RWA regime.

6 pages, 4 figures

References in corpus (7)

• Matter-wave interferometry in a double well on an atom chip
• Long Phase Coherence Time and Number Squeezing of two Bose-Einstein Condensates on an Atom Chip
• Radio-frequency dressed state potentials for neutral atoms
• Ultracold atoms confined in rf-induced two-dimensional trapping potentials
• Manipulation of ultracold atoms in dressed adiabatic radio frequency potentials
• Bose-Einstein condensates in RF-dressed adiabatic potentials
• Evaporative cooling in a radio-frequency trap

Cited by in corpus (4)

• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Magnetic interactions of cold atoms with anisotropic conductors
• Vibrational Bloch-Siegert effect in trapped ions
• Optical Stern Gerlach Effect beyond the rotating wave approximation