The Role of Interactions, Tunneling and Harmonic Confinement on the Adiabatic Loading of Bosons in Anoptical Lattice.

Published

February 10, 2006

Author(s)

A M. Rey, G Pupillo, James V. Porto

Abstract

We calculate entropy-temperature curves for interact in bosons in unit filled optical lattices for both homogeneous and harmonically trapped situations, and use them to understand how adiabatic changes in the lattice depth affect the temperature of the system. In a translationally invariant lattice, the zero tunneling limit facilitates a rather detailed analytic description. Unlike the non-interacting bosonic system which is always cooled upon adiabatic loading for low enough initial temperature, the change in the excitation spectrum induced by interactions can lead to heating. Finite tunneling helps to reduce this heating. Finally, we study the spatially inhomogeneous system confined in a parabolic potential and show that the presence of the trap can significantly reduce the final available temperature, due to the non-vanishing superfluid component at the edge of the cloud which is present in trapped systems.

Citation

Physical Review A (Atomic, Molecular and Optical Physics)

Pub Type

Journals

Keywords

bosons, optical lattice, thermodynamics

Citation

Rey, A. , Pupillo, G. and Porto, J. (2006), The Role of Interactions, Tunneling and Harmonic Confinement on the Adiabatic Loading of Bosons in Anoptical Lattice., Physical Review A (Atomic, Molecular and Optical Physics) (Accessed April 24, 2024)