An atom chip interferometer

Abstract

We have realized an interferometer using a thermal cloud of magnetically trapped rubidium 87 atoms on a chip. The interferometer resembles a Ramsey interferometer with a state selective spatial splitting of the two internal states as proposed in [M. Ammar, and al., Phys. Rev. A, 91, 053623]. The splitting is effected by microwave fields from two on-chip waveguides while the atoms remain magnetically trapped. The inferred maximum separation is $1.2\pm 0.1\mu$m. We observe interference fringes with a contrast around 8\% limited by velocity difference of the two interferometer states when we close the interferometer. We develop a model describing this contrast decay.

14 pages, 10 figures

References in corpus (21)

• Atom Interferometers
• Atom chip based generation of entanglement for quantum metrology
• Stimulated Raman adiabatic passage in physics, chemistry and beyond
• Matter-wave interferometry in a double well on an atom chip
• An Atom Michelson Interferometer on a Chip Using a Bose-Einstein Condensate
• Coherence in Microchip Traps
• Effect of cold collisions on spin coherence and resonance shifts in a magnetically trapped ultra-cold gas
• Interleaved Atom Interferometry for High Sensitivity Inertial Measurements
• Coherent manipulation of Bose-Einstein condensates with state-dependent microwave potentials on an atom chip
• High-accuracy inertial measurements with cold-atom sensors
• Shortcuts to adiabaticity for trapped ultracold gases
• Fast manipulation of Bose-Einstein condensates with an atom chip
• Stability of a trapped atom clock on a chip
• Optimal control of the transport of Bose-Einstein condensates with atom chips
• Trapping atoms with radio-frequency adiabatic potentials
• Realistic Shortcuts to Adiabaticity in Optical Transfer
• Contrast and phase-shift of a trapped atom interferometer using a thermal ensemble with internal state labelling
• Symmetric micro-wave potentials for interferometry with thermal atoms on a chip
• Microwave-stimulated Raman adiabatic passage in a Bose-Einstein condensate on an atom chip
• Experimental study of the role of trap symmetry in an atom-chip interferometer above the Bose-Einstein condensation threshold
• Effect of trap symmetry and atom-atom interactions on a trapped atom interferometer with internal state labelling