260 citations · 2.8k across the 136 of their papers we have counts for
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Beyond Mean-Field Low-Lying Excitations of Dipolar Bose Gases
Aristeu R. P. Lima, Axel Pelster
We theoretically investigate various beyond mean-field effects on Bose gases at zero temperature featuring the anisotropic and long-range dipole-dipole interaction in addition to t…
Smearing Formulas for Density Matrices
Michael Bachmann, Hagen Kleinert, Axel Pelster
We report on the development of a systematic variational perturbation theory for the euclidean path integral representation of the density matrix based on new smearing formulas for…
Nonlinear Bose-Einstein-condensate Dynamics Induced by a Harmonic Modulation of the s-wave Scattering Length
Ivana Vidanovic, Antun Balaz, Hamid Al-Jibbouri +1
In a recent experiment, a Bose-Einstein condensate of Li7 has been excited by a harmonic modulation of the atomic s-wave scattering length via Feshbach resonance. By combining an a…
Quantum Fluctuations in Dipolar Bose Gases
Aristeu R. P. Lima, Axel Pelster
We investigate the influence of quantum fluctuations upon dipolar Bose gases by means of the Bogoliubov-de Gennes theory. Thereby, we make use of the local density approximation to…
Dipolar Bose-Einstein Condensates with Weak Disorder
Christian Krumnow, Axel Pelster
A homogeneous polarized dipolar Bose-Einstein condensate is considered in the presence of weak quenched disorder within mean-field theory at zero temperature. By first solving pert…