Dipolar relaxation in an ultra-cold gas of magnetically trapped chromium atoms

2003/07/25 by S. Hensler, J. Werner, J.H. Werner +11 · 10 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #quant-ph

paper · pdf · doi:10.1007/s00340-003-1334-0

9 pages, 9 figures

arxiv created 2003/07/25 · openalex publication_date 2003/12/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We have investigated both theoretically and experimentally dipolar relaxation in a gas of magnetically trapped chromium atoms. We have found that the large magnetic moment of 6 μ_B results in an event rate coefficient for dipolar relaxation processes of up to 3.2⋅10^-11 cm³s^-1 at a magnetic field of 44 G. We present a theoretical model based on pure dipolar coupling, which predicts dipolar relaxation rates in agreement with our experimental observations. This very general approach can be applied to a large variety of dipolar gases.

Citations

• Bose-Einstein condensation with magnetic dipole-dipole forces
• Quantum Phases of Dipolar Bosons in Optical Lattices
• Ferromagnetism in a Lattice of Bose-Einstein Condensates

Cited by

• Nonequilibrium Quantum Magnetism in a Dipolar Lattice Gas
• Ultracold dipolar gases in optical lattices
• Observation of the Einstein-de Haas Effect in a Bose-Einstein condensate
• Ground states of spin-3 Bose-Einstein condensates for conserved magnetization
• Driving Dipolar Fermions into the Quantum Hall Regime by Spin-Flip Induced Insertion of Angular Momentum
• Quantum correlations and entanglement in far-from-equilibrium spin systems
• Collisional properties of cold spin-polarized nitrogen gas: Theory, experiment, and prospects as a sympathetic coolant for trapped atoms and molecules
• Tuning the Dipole-Dipole Interaction in a Quantum Gas with a Rotating Magnetic Field
• An effective many-body theory for strongly interacting polar molecules
• Demagnetization cooling of a gas