25 citations · 30 across the 3 of their papers we have counts for
4 papers · 1 filter
On a dual model for 5f electrons
D. V. Efremov, N. Hasselmann, E. Runge +2
We study the effect of intra-atomic correlations on anisotropies of hopping of 5f electrons. It is shown that they may considerably enhance these anisotropies to the extend that el…
Origin of heavy quasiparticles in UPt_3
G. Zwicknagl, A. N. Yaresko, P. Fulde
We propose a microscopic description of heavy fermions in UPt_3. It is based on the assumption that two of the three 5f electrons of the U ions are localized. Band-structure calcul…
Geometrical Properties of Cumulant Expansions
K. Kladko, P. Fulde
Cumulants represent a natural language for expressing macroscopic properties of a solid. We show that cumulants are subject to a nontrivial geometry. This geometry provides an intu…
Calculating excitation energies with the help of cumulants
T. Schork, P. Fulde
Recently, it has been shown that the ground-state energy of a quantum many-body system can be written in terms of cumulants. In this paper we show that the energies of excited stat…