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Dissipative quantum dynamics of bosonic atoms in a shallow 1D optical lattice

J. Ruostekoski·L. Isella
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Abstract

We theoretically study the dipolar motion of bosonic atoms in a very shallow, strongly confined 1D optical lattice using the parameters of the recent experiment [Fertig et al., Phys. Rev. Lett. 94, 220402 (2005)]. We find that, due to momentum uncertainty, a small, but non-negligible, atom population occupies the unstable velocity region of the corresponding classical dynamics, resulting in the observed dissipative atom transport. This population is generated even in a static vapor, due to quantum fluctuations which are enhanced by the lattice and the confinement, and is not notably affected by the motion of atoms or finite temperature.

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J. Ruostekoski, L. Isella. 2005-07-21. Dissipative quantum dynamics of bosonic atoms in a shallow 1D optical lattice. https://doi.org/10.1103/physrevlett.95.110403

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