Radio-frequency dressed state potentials for neutral atoms

Abstract

Potentials for atoms can be created by external fields acting on properties like magnetic moment, charge, polarizability, or by oscillating fields which couple internal states. The most prominent realization of the latter is the optical dipole potential formed by coupling ground and electronically excited states of an atom with light. Here we present an experimental investigation of the remarkable properties of potentials derived from radio-frequency (RF) coupling between electronic ground states. The coupling is magnetic and the vector character allows to design state dependent potential landscapes. On atom chips this enables robust coherent atom manipulation on much smaller spatial scales than possible with static fields alone. We find no additional heating or collisional loss up to densities approaching $10^{15}$ atoms / cm${}^3$ compared to static magnetic traps. We demonstrate the creation of Bose-Einstein condensates in RF potentials and investigate the difference in the interference between two independently created and two coherently split condensates in identical traps. All together this makes RF dressing a powerful new tool for micro manipulation of atomic and molecular systems.

References in corpus (3)

• Matter-wave interferometry in a double well on an atom chip
• Ultracold atoms confined in rf-induced two-dimensional trapping potentials
• Realizing a stable magnetic double-well potential on an atom chip

Cited by in corpus (18)

• Atom Interferometers
• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
• Optimal quantum control of Bose Einstein condensates in magnetic microtraps
• Optimizing number squeezing when splitting a mesoscopic condensate
• Matter-wave Interferometry with Phase Fluctuating Bose-Einstein Condensates
• State-dependent, addressable subwavelength lattices with cold atoms
• Rotational Fluxons of Bose-Einstein Condensates in Coplanar Double-Ring Traps
• Multi-layer atom chips for versatile atom micro manipulation
• Dark dynamic acousto-optic ring lattices for ultracold atoms
• Mapping of Coulomb gases and sine-Gordon models to statistics of random surfaces
• Trapping and cooling of rf-dressed atoms in a quadrupole magnetic field
• Influence of the Radio-Frequency source properties on RF-based atom traps
• Enhancement of On-Site Interactions of Tunnelling Ultracold Atoms in Optical Potentials using Radio-Frequency Dressing
• Magnetic interactions of cold atoms with anisotropic conductors
• Macroscopic entanglement between a Bose Einstein condensate and a superconducting loop
• Macroscopic Entanglement of a Bose Einstein Condensate on a Superconducting Atom Chip
• Interaction induced trapping and pulsed emission of a magnetically insensitive Bose-Einstein Condensate