Frankfurt 2006 – wissenschaftliches Programm

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A: Atomphysik

A 6: Ultrakalte Atomphysik II: Dynamik mit Bose-Einstein Kondensaten

A 6.4: Vortrag

Dienstag, 14. März 2006, 15:00–15:15, H6

Microscopic dynamics of Bose atoms in a parabolic lattice — •Andrey Kolovsky^1,2, Alexey Ponomarev^1,2, and Andreas Buchleitner¹ — ¹Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, D-01187 Dresden — ²Kirensky Institute of Physics, Ru-660036 Krasnoyarsk

We consider bosonic atoms in an anisotropic three dimensional optical lattice, created by standing laser waves with amplitudes V_z ≪ V_x, V_y ∼ 30 E_R (E_R being the recoil energy). The strong transverse confinement of the atoms reduces the problem to that for a small (N<100) ensemble of bosonic atoms in a 1D parabolic lattice, where the atom-atom interaction plays a crucial role. We study the dynamical response of the system to a sudden perturbation (like switching off the magnetic field which compensates the gravitational force), in dependence of the atom number N, and of the amplitude V_z of the optical potential along the weak axis of the 3D lattice.