Dipole oscillations of confined lattice bosons in one dimension

Details Dipole oscillations of confined lattice bosons in one dimension Dipole oscillations of confined lattice bosons in one dimension

2008-10-09

arxiv.org/abs/0810.1665v1

Phys. Rev. A 79, 041602(R) (2009)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.79.041602

We study the dynamics of a non-integrable system comprising interacting cold bosons trapped in an optical lattice in one-dimension by means of exact time-dependent numerical DMRG techniques. Particles are confined by a parabolic potential, and dipole oscillations are induced by displacing the trap center of a few lattice sites. Depending on the system parameters this motion can vary from undamped to overdamped. We study the dipole oscillations as a function of the lattice displacement, the particle density and the strength of interparticle interactions. These results explain the recent experiment C.D. Fertig et al., Phys. Rev. Lett. 94, 120403 (2005).

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