期刊
PHYSICAL REVIEW A
卷 79, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.041602
关键词
boson systems; numerical analysis; optical lattices; radiation pressure
资金
- OLAQUI
- NAMEQUAM
- FWF
- MURI
- EUROSQIP
- SFB/TRR21
- DARPA
We study the dynamics of a nonintegrable system comprising interacting cold bosons trapped in an optical lattice in one dimension by means of exact time-dependent numerical density-matrix renormalization group 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 , Phys. Rev. Lett. 94, 120403 (2005)].
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