Polar molecules in bilayers with high population imbalance

Year: 2013

Authors: Klawunn M., Recati A.

Autors Affiliation: INO-CNR Bose-Einstein Condensation Center, Department of Physics, Università di Trento, 38123 Povo, Italy

Abstract: We investigate a dilute Fermi gas of polar molecules confined into a bilayer setup with dipole moments polarized perpendicular to the layers. In particular, we consider the extreme case of population imbalance, where we have only one particle in one layer and many particles in the other one. The single molecule is attracted by the dilute Fermi gas through the interlayer dipole-dipole force, presenting an interesting impurity problem with long-range anisotropic interaction. We characterize the quasiparticle, calculating its chemical potential with a Brueckner-Hartree-Fock approach. Moreover, we determine the momentum relaxation rate for finite momentum and temperature. The latter is reminiscent of Coulomb drag in bilayer electronic systems. For a confined system we relate the results for the chemical potential with the measurement of the oscillation frequency of the impurity. The momentum relaxation rate provides instead an estimate on how quickly the oscillations are damped.


Volume: 88 (1)      Pages from: 013633  to: 013633

More Information: Useful discussions with Stefano Giorgini, Natalia Matveeva, Alexander Pikovski, and Luis Santos are acknowledged. This work has been supported by ERC through the QGBE grant and by Provincia Autonoma di Trento.
DOI: 10.1103/PhysRevA.88.013633

Citations: 6
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