Bose-Fermi mixtures of self-assembled filaments of fermionic polar molecules

Details Bose-Fermi mixtures of self-assembled filaments of fermionic polar molecules Bose-Fermi mixtures of self-assembled filaments of fermionic polar molecules

2009-07-27

arxiv.org/abs/0907.4612v1

Phys. Rev. A 81, 013604 (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

10.1103/PhysRevA.81.013604

Fermionic polar molecules in deep 1D optical lattices may form self-assembled filaments when the electric dipoles are oriented along the lattice axis. These composites are bosons or fermions depending on the number of molecules per chain, leading to a peculiar and complex Bose-Fermi mixture, which we discuss in detail for the simplest case of a three-well potential. We show that the interplay between filament binding energy, transverse filament modes, and trimer Fermi energy leads to a rich variety of possible scenarios ranging from a degenerate Fermi gas of trimers to a binary mixture of two different types of bosonic dimers. We study the intriguing zero temperature and finite temperature physics of these composites for the particular case of an ideal filament gas loaded in 1D sites, and discuss possible methods to probe these chain mixtures.

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