Experimental Study of the Role of Atomic Interactions on Quantum Transport

Details Experimental Study of the Role of Atomic Interactions on Quantum Transport Experimental Study of the Role of Atomic Interactions on Quantum Transport

2005-09-02

arxiv.org/abs/quant-ph/0509025v2

Phys. Rev. Lett. 96, 150401 (2006)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.96.150401

We report an experimental study of quantum transport for atoms confined in a periodic potential and compare between thermal and BEC initial conditions. We observe ballistic transport for all values of well depth and initial conditions, and the measured expansion velocity for thermal atoms is in excellent agreement with a single-particle model. For weak wells, the expansion of the BEC is also in excellent agreement with single-particle theory, using an effective temperature. We observe a crossover to a new regime for the BEC case as the well depth is increased, indicating the importance of interactions on quantum transport.

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