Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms.

Published

September 7, 2012

Author(s)

A Petrov, Svetlana A. Kotochigova, Eite Tiesinga

Abstract

We explore the anisotropic nature of Feshbach resonances in the collision between ultracold magnetic submerged-shell dysprosium atoms, which can only occur due to couplings to rotating bound states. This is in contrast to well-studied alkali-metal atom collisions, where most Feshbach resonances are hyperfine induced and due to rotation-less bound states. Our novel first-principle coupled-channel calculation of the collisions between open 4f-shell spin-polarized bosonic Dy atoms reveals a striking correlation be tween the anisotropy due to magnetic dipole-dipole and electrostatic interactions and the Feshbach spectrum as a function of an external magnetic field. In a 20 mT magnetic field range we predict about a dozen Feshbach resonances and show that the resonance locations are exquisitely sensitive to the dysprosium isotope.

Citation

Physical Review Letters

Pub Type

Journals

Download Paper

DOI Link

Keywords

Dysprosium, Ultracold atoms, agnetic atoms, collision physics

Citation

Petrov, A. , Kotochigova, S. and Tiesinga, E. (2012), Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms., Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.109.103002 (Accessed October 10, 2025)