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26 papers · 1 filter
Vortex formation in a stirred Bose-Einstein condensate
K. W. Madison, F. Chevy, W. Wohlleben +1
Using a focused laser beam we stir a Bose-Einstein condensate of 87Rb confined in a magnetic trap and observe the formation of a vortex for a stirring frequency exceeding a critica…
Nonlinear Matter Wave Dynamics with a Chaotic Potential
S. A. Gardiner, D. Jaksch, R. Dum +2
We consider the case of a cubic nonlinear Schrödinger equation with an additional chaotic potential, in the sense that such a potential produces chaotic dynamics in classical mecha…
Comment on "Demonstration of the Casimir Force in the 0.6 to 6 micrometer Range"
A. Lambrecht, S. Reynaud
We comment on a recently published measurement of the Casimir force for distances in the 0.6 to 6 micrometer range between two Au surfaces (Phys. Rev. Lett. 78, 5(1997)) and the ne…
Bogoliubov transformation for distinguishable particles
Markus Holzmann, Franck Laloë
The Bogoliubov transformation is generally derived in the context of identical bosons with the use of ``second quantized'' a and operators (or, equivalently, in field…
Bose-Einstein condensation in quasi2D trapped gases
D. S. Petrov, M. Holzmann, G. V. Shlyapnikov
We discuss BEC in (quasi)2D trapped gases and find that well below the transition temperature the equilibrium state is a true condensate, whereas at intermediate temperatures…
Simultaneous Magneto-Optical Trapping of Two Lithium Isotopes
Marc-Oliver Mewes, Gabriele Ferrari, Florian Schreck +2
We confine 4 10^8 fermionic 6Li atoms simultaneously with 9 10^9 bosonic 7Li atoms in a magneto-optical trap based on an all-semiconductor laser system. We optimize the two-isotope…