On Vortices Induced in Superfluid Films by Crossed Electric and Magnetic Fields

Xiao Li, Ran Cheng, Qian Niu

D. V. Fil, S. I. Shevchenko

Crossed electric and magnetic fields influence dipolar neutral particles in the same way as the magnetic field influences charged particles. The effect of crossed fields is proportional to the dipole moment of the particle (inherent or induced). We show that this effect is quite spectacular in a multilayer system of polar molecules. In this system molecules may bind in chains. At low temperature the gas of chains becomes the superfluid one. The crossed fields then induce vortices in the superfluid gas of chains. The density of vortices is proportional to the number of particles in the chain. The effect can be used for monitoring the formation and destruction of chains in multilayer dipolar gases.

Subir Sachdev A

D. V. Fil, S. I. Shevchenko

Crossed electric and magnetic fields influence dipolar neutral particles in the same way as the magnetic field influences charged particles. The effect of crossed fields is proportional to the dipole moment of particles (inherent or induced). We show that the effect of crossed fields is quite spectacular in a multilayer system of polar molecules with dipole moments perpendicular to the layers. In this system the dipoles are coupled into chains, with a very large dipole moment of a given chain. The crossed fields may then induce a large number of vortices in the superfluid gas of chains. This effect can be used for monitoring the formation and dissociation of chains in multilayer dipolar structures.

Joseph L. McCauley, Clinton W. Allen, F.W. Lipps

Ertugrul Demircan