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Ballistic expansion of a dipolar condensate
Stefano Giovanazzi, Axel Gorlitz, Tilman Pfau
We have studied the free expansion of a Bose condensate in which both the usual s-wave contact interaction and the dipole-dipole interaction contribute considerably to the total in…
Tuning the dipolar interaction in quantum gases
Stefano Giovanazzi, Axel Gorlitz, Tilman Pfau
We have studied the tunability of the interaction between permanent dipoles in Bose-Einstein condensates. Based on time-dependent control of the anisotropy of the dipolar interacti…
Enhancement and suppression of spontaneous emission and light scattering by quantum degeneracy
A. Gorlitz, A. P. Chikkatur, W. Ketterle
Quantum degeneracy modifies light scattering and spontaneous emission. For fermions, Pauli blocking leads to a suppression of both processes. In contrast, in a weakly interacting B…
Excitation of phonons in a Bose-Einstein condensate by light scattering
D. M. Stamper-Kurn, A. P. Chikkatur, A. Görlitz +4
Stimulated small-angle light scattering was used to measure the structure factor of a Bose-Einstein condensate in the phonon regime. The excitation strength for phonons was found t…