Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 35: Quantum Gases (Fermions) I
Q 35.3: Vortrag
Mittwoch, 13. März 2019, 14:45–15:00, S HS 037 Informatik
Degenerate Fermi gases of polar molecules with tilted dipoles — •Vladimir Veljić1, Axel Pelster2, and Antun Balaž1 — 1Scientific Computing Laboratory, Center for the Study of Complex Systems, Institute of Physics Belgrade, University of Belgrade, Serbia — 2Research Center OPTIMAS and Department of Physics, Technische Universität Kaiserslautern, Germany
A recent experimental realization of an ultracold quantum degenerate gas of 40K87Rb molecules [1] opens up a new chapter in exploring strongly dipolar Fermi gases. This includes the deformation of the Fermi surface (FS) for polarized systems, where the electric dipoles have a preferential orientation. Compared to atomic magnetic species [2,3], this effect is significantly increased in ultracold Fermi gases of polar molecules, and the stability of the system is expected to strongly depend on its geometry. Here we generalize a previous Hartree-Fock mean-field theory [2] for the Wigner function, which now takes into account that the cloud shape in the ground state is determined not only by the trap frequencies, but also by the dipoles’ orientation. We calculate the corresponding FS deformation for an arbitrary orientation of the dipoles, demonstrating the great promise for the exploration of polarized degenerate molecules.
[1] L. De Marco, G. Valtolina, K. Matsuda, W. G. Tobias, J. P. Covey, and J. Ye, arXiv:1808.00028 (2018).
[2] V. Veljić, A. R. P. Lima, L. Chomaz, S. Baier, M. J. Mark, F. Ferlaino, A. Pelster, and A. Balaž, New J. Phys. 20, 093016 (2018).
[3] V. Veljić, A. Balaž, and A. Pelster, Phys. Rev. A 95, 053635 (2017).