%0 Journal Article %J Physical Review Letters %D 2012 %T Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms %A Alexander Petrov %A Eite Tiesinga %A Svetlana Kotochigova %X 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 dysprosium reveals a striking correlation between the anisotropy due to magnetic dipole-dipole and electrostatic interactions and the Feshbach spectrum as a function of an external magnetic field. Over 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. %B Physical Review Letters %V 109 %8 2012/9/7 %G eng %U http://arxiv.org/abs/1203.4172v1 %N 10 %! Phys. Rev. Lett. %R 10.1103/PhysRevLett.109.103002