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6 papers · 2 filters
Cavity-induced temperature control of a two-level system
Hendrik Weimer, Günter Mahler
We consider a two-level atom interacting with a single mode of the electromagnetic field in a cavity within the Jaynes-Cummings model. Initially, the atom is thermal while the cavi…
Time propagation of constrained coupled Gaussian wave packets
T. Fabcic, J. Main, G. Wunner
The dynamics of quantum systems can be approximated by the time propagation of Gaussian wave packets. Applying a time dependent variational principle, the time evolution of the par…
Rydberg excitation of Bose-Einstein condensates
Rolf Heidemann, Ulrich Raitzsch, Vera Bendkowsky +3
Rydberg atoms provide a wide range of possibilities to tailor interactions in a quantum gas. Here we report on Rydberg excitation of Bose-Einstein condensed 87Rb atoms. The Rydberg…
Bose-Einstein condensates with attractive 1/r interaction: The case of self-trapping
I. Papadopoulos, P. Wagner, G. Wunner +1
Amplifying on a proposal by O'Dell et al. for the realization of Bose-Einstein condensates of neutral atoms with attractive interaction, we point out that the instance of sel…
Local effective dynamics of quantum systems: A generalized approach to work and heat
Hendrik Weimer, Markus J. Henrich, Florian Rempp +2
By computing the local energy expectation values with respect to some local measurement basis we show that for any quantum system there are two fundamentally different contribution…
Evidence for coherent collective Rydberg excitation in the strong blockade regime
Rolf Heidemann, Ulrich Raitzsch, Vera Bendkowsky +4
Blockade effects on the single quantum level are at the heart of quantum devices like single-electron transistors. The blockade mechanisms are based on strong interactions like the…