Heavy fermions in an optical lattice

Details Heavy fermions in an optical lattice Heavy fermions in an optical lattice

2010-07-28

arxiv.org/abs/1007.5083v1

Phys. Rev. A 82, 053624 (2010)

Physics

Condensed Matter

Quantum Gases

12 pages, 7 figures

Scientific paper

We employ a mean-field theory to study ground-state properties and transport of a two-dimensional gas of ultracold alklaline-earth metal atoms governed by the Kondo Lattice Hamiltonian plus a parabolic confining potential. In a homogenous system this mean-field theory is believed to give a qualitatively correct description of heavy fermion metals and Kondo insulators: it reproduces the Kondo-like scaling of the quasiparticle mass in the former, and the same scaling of the excitation gap in the latter. In order to understand ground-state properties in a trap we extend this mean-field theory via local-density approximation. We find that the Kondo insulator gap manifests as a shell structure in the trapped density profile. In addition, a strong signature of the large Fermi surface expected for heavy fermion systems survives the confinement, and could be probed in time-of-flight experiments. From a full self-consistent diagonalization of the mean-field theory we are able to study dynamics in the trap. We find that the mass enhancement of quasiparticle excitations in the heavy Fermi liquid phase manifests as slowing of the dipole oscillations that result from a sudden displacement of the trap center.

Affiliated with

Also associated with

No associations

Rating

Heavy fermions in an optical lattice does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Heavy fermions in an optical lattice, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy fermions in an optical lattice will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-450494