Observation of Elastic Doublon Decay in the Fermi-Hubbard Model

Details Observation of Elastic Doublon Decay in the Fermi-Hubbard Model Observation of Elastic Doublon Decay in the Fermi-Hubbard Model

2009-05-18

arxiv.org/abs/0905.2963v2

Phys. Rev. Lett. 104, 080401 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 4 figures, published version

Scientific paper

10.1103/PhysRevLett.104.080401

We investigate the decay of highly excited states of ultracold fermions in a three-dimensional optical lattice. Starting from a repulsive Fermi-Hubbard system near half filling, we generate additional doubly occupied sites (doublons) by lattice modulation. The subsequent relaxation back to thermal equilibrium is monitored over time. The measured doublon lifetime covers two orders of magnitude. In units of the tunneling time h/J it is found to depend exponentially on the ratio of on-site interaction energy U to kinetic energy J. We argue that the dominant mechanism for the relaxation is a high order scattering process involving several single fermions as scattering partners. A many-body calculation is carried out using diagrammatic methods, yielding good agreement with the data.

Affiliated with

Also associated with

No associations

Rating

Observation of Elastic Doublon Decay in the Fermi-Hubbard Model 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 Observation of Elastic Doublon Decay in the Fermi-Hubbard Model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of Elastic Doublon Decay in the Fermi-Hubbard Model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-698909