|Title||Magnetic Feshbach resonances and Zeeman relaxation in bosonic chromium gas with anisotropic interaction|
|Publication Type||Journal Article|
|Year of Publication||2005|
|Authors||Pavlovic, Z, Krems, RV, Cote, R, Sadeghpour, HR|
|Journal||PHYSICAL REVIEW A|
Rigorous calculations of magnetic Feshbach resonances and Zeeman relaxation cross sections in an ultracold and cold chromium gas are reported. This work presents the calculation of such inelastic processes in collisions of atoms with large magnetic moments. Using our recently constructed accurate interaction potentials for the chromium dimer, we compute the positions and widths of magnetically tuned resonances in an optically trapped ultracold Cr gas. We find good agreement with recent experimental data and report that spin-change collision cross sections quickly increase with decreasing collision energy and magnetic-field strength at energies below 1 K and magnetic fields larger than 40 G.