Decoherence of Bose-Einstein condensates in microtraps

Abstract

We discuss the impact of thermally excited near fields on the coherent expansion of a condensate in a miniaturized electromagnetic trap. Monte Carlo simulations are compared with a kinetic two-component theory and indicate that atom interactions can slow down decoherence. This is explained by a simple theory in terms of the condensate dynamic structure factor.

5 pages, 4 figures

References in corpus (7)

• Thermally induced spin flips above an atom chip
• Bose-Einstein condensates near a microfabricated surface
• Disordered Bose-Einstein Condensates in Quasi One-Dimensional Magnetic Microtraps
• Dynamical transition from a quasi-one dimensional Bose-Einstein condensate to a Tonks-Girardeau gas
• Fundamental Limits for Coherent Manipulation on Atom Chips
• Thermodynamics of an interacting trapped Bose-Einstein gas in the classical field approximation
• Anomalous Longitudinal Magnetic Field near the Surface of Copper Conductors

Cited by in corpus (5)

• Classical aspects of ultracold atom wavepacket motion through microstructured waveguide bends
• Transversal laser excitation of atoms in a waveguide
• Suppression and enhancement of decoherence in an atomic Josephson junction
• Robust spatial coherence 5$\mu$m from a room-temperature atom chip
• Long spatial coherence times a few micro-meters from a room temperature surface