Diffusion in a system of a few distinguishable fermions in a one-dimensional double-well potential
1 Institute of Physics of the Polish Academy of Sciences - Al. Lotników 32/46, 02-668 Warszawa, Poland
2 Center for Theoretical Physics of the Polish Academy of Sciences - Al. Lotników 32/46, 02-668 Warszawa, Poland
Received: 20 November 2015
Accepted: 15 March 2016
Dynamical properties of a few ultra-cold fermions confined in a double-well potential are studied. We show that the dynamics, which is governed by single-particle tunnelings for vanishing interactions, is completely different for strong interactions. Depending on the details of the configuration, for sufficiently strong interactions (repulsions or attractions) the particle flow through the barrier can be accelerated or slowed down. This effect cannot be explained with the single-particle picture. It is clarified with a direct inspection of the spectrum of the few-body Hamiltonian.
PACS: 67.85.Lm – Degenerate Fermi gases
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