Coherent injecting, extracting, and velocity filtering of neutral atoms in a ring trap via spatial adiabatic passage

Abstract

We introduce here a coherent technique to inject, extract, and velocity filter neutral atoms in a ring trap coupled via tunneling to two additional waveguides. By adiabatically following the transverse spatial dark state, the proposed technique allows for an efficient and robust velocity dependent atomic population transfer between the ring and the input/output waveguides. We have derived explicit conditions for the spatial adiabatic passage that depend on the atomic velocity along the input waveguide as well as on the initial population distribution among the transverse vibrational states. The validity of our proposal has been checked by numerical integration of the corresponding two dimensional Schrödinger equation with state-of-the-art parameter values for ${}^{87}$Rb atoms and an optical dipole ring trap.

To be published in European Physical Journal D

References in corpus (10)

• Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
• Optical ferris wheel for ultracold atoms
• Mean-field dynamics of a Bose-Einstein condensate in a time-dependent triple-well trap: Nonlinear eigenstates, Landau-Zener models and STIRAP
• Towards a Landau-Zener formula for an interacting Bose-Einstein condensate
• Versatile two-dimensional potentials for ultra-cold atoms
• Using time reversal symmetry for sensitive incoherent matter-wave Sagnac interferometry
• Phonon-induced artificial magnetic fields
• Filtering of matter wave vibrational states via spatial adiabatic passage
• Supercurrents in an atom-molecule gas in an optical ring lattice

Cited by in corpus (6)

• Roadmap on Atomtronics: State of the art and perspective
• Sagnac Interferometry Using Bright Matter-Wave Solitons
• Blue-detuned optical ring trap for Bose-Einstein condensates based on conical refraction
• Polarization tailored novel vector beams based on conical refraction
• Spatial non-adiabatic passage using geometric phases
• Persistent currents in ultracold gases