Atomic coupler for a trapped quantum degenerate Fermi gas

Mariusz Gajda, Piotr Krekora, Arkadiusz Orłowski +1 more

D. S. Jin

Sierk Pötting, M. Cramer, Weiping Zhang +1 more

We investigate theoretically the Raman coupling between two internal states of a trapped low-density quantum-degenerate Fermi gas. In general, the trap frequencies associated with the two internal states can be different, leading to the onset of collapses and revivals in the population difference $\ensuremath{\Delta}N$ of the two internal states. This behavior can be changed drastically by two-body collisions. In particular, we show that under appropriate conditions they can suppress the dephasing leading to the collapse of $\ensuremath{\Delta}N,$ and restore almost full Rabi oscillations between the two internal states. These results are compared and contrasted to those for a quantum-degenerate bosonic gas.

Stefan H. Myrskog, S. Aubin, M. Extavour +3 more

We present progress toward creation of degenerate Fermi gas of potassium-40 atoms trapped on a micro-fabricated chip. Such a cold quantum gas can be used to study low-dimensional many-body systems.

M. Ya. Amusia, Vasily R. Shaginyan

Jiaming Li, Ji Liu, Wen Xu +2 more

We demonstrate a technique for cooling a degenerate Fermi gas in a crossed-beam optical dipole trap, where high-energy atoms can be selectively removed from the trap by modulating the stiffness of the trapping potential with anharmonic trapping frequencies. We measure the dependence of the cooling effect on the frequency and amplitude of the parametric modulations. It is found that the large anharmonicity along the axial trapping potential allows one to generate a degenerate Fermi gas with anisotropic energy distribution, in which the cloud energy in the axial direction can be reduced to the ground state value.