International Workshop on Ultracold Group II Atoms

One-dimensional two-orbital SU($N$) ultracold fermionic quantum gases at incommensurate filling for a low-energy approach

Feb 22, 2016, 4:00 PM

3h

Paris

Poster Poster session

Speakers

Mr Pierre Fromholz (LPTM Cergy)Mr Valentin Bois (LPTM Cergy)

Description

We investigate the zero-temperature phase diagram of two-orbital SU($N$) fermionic models at incommensurate filling which are directly relevant to strontium and ytterbium ultracold atoms loading into a one-dimensional optical lattice. Using a low-energy approach that takes into account explicitly the SU($N$) symmetry, we find that a spectral gap for the nuclear-spin degrees of freedom is formed for generic interactions. Several phases with one or two gapless modes are then stabilized which describe the competition between different density instabilities.