Analytical solutions for the dynamics of two trapped interacting ultracold atoms

Details Analytical solutions for the dynamics of two trapped interacting ultracold atoms Analytical solutions for the dynamics of two trapped interacting ultracold atoms

2006-04-27

arxiv.org/abs/quant-ph/0604205v1

Phys. Rev. A 74, 022712 (2006)

Physics

Quantum Physics

RevTeX, 15 pages, 15 figures

Scientific paper

10.1103/PhysRevA.74.022712

We discuss exact solutions of the Schroedinger equation for the system of two ultracold atoms confined in an axially symmetric harmonic potential. We investigate different geometries of the trapping potential, in particular we study the properties of eigenenergies and eigenfunctions for quasi-one- and quasi-two-dimensional traps. We show that the quasi-one- and the quasi-two-dimensional regimes for two atoms can be already realized in the traps with moderately large (or small) ratios of the trapping frequencies in the axial and the transverse directions. Finally, we apply our theory to Feshbach resonances for trapped atoms. Introducing in our description an energy-dependent scattering length we calculate analytically the eigenenergies for two trapped atoms in the presence of a Feshbach resonance.

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