Atoms in a radiofrequency-dressed optical lattice

Abstract

We load cold atoms into an optical lattice dramatically reshaped by radiofrequency (rf) coupling of state-dependent lattice potentials. This rf dressing changes the unit cell of the lattice at a subwavelength scale, such that its curvature and topology departs strongly from that of a simple sinusoidal lattice potential. Radiofrequency dressing has previously been performed at length scales from mm to tens of microns, but not at the single-optical-wavelength scale. At this length scale significant coupling between adiabatic potentials leads to nonadiabatic transitions, which we measure as a function of lattice depth and dressing frequency and amplitude. We also investigate the dressing by measuring changes in the momentum distribution of the dressed states.

5 pages, 4 figures

References in corpus (8)

• Matter-wave interferometry in a double well on an atom chip
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• A lattice of double wells for manipulating pairs of cold atoms
• Preparing and probing atomic number states with an atom interferometer
• Sublattice addressing and spin-dependent motion of atoms in a double-well lattice
• Ultracold atoms confined in rf-induced two-dimensional trapping potentials
• Searching for a Supersolid in Cold Atom Optical Lattices
• Bose-Einstein condensates in RF-dressed adiabatic potentials

Cited by in corpus (10)

• Coherent control of dressed matter waves
• Nano-Scale `Dark State' Optical Potentials for Cold Atoms
• State-dependent, addressable subwavelength lattices with cold atoms
• Subwavelength-width optical tunnel junctions for ultracold atoms
• Trapping atoms with radio-frequency adiabatic potentials
• Enhancement of On-Site Interactions of Tunnelling Ultracold Atoms in Optical Potentials using Radio-Frequency Dressing
• 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
• Creating versatile atom traps by applying near resonant laser light in magnetic traps