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cond-mat.mtrl-sci2006
Conserved geometric phase and group velocity
Simone Selenu
In this paper we make use of the concept of conserved geometric phase and of group velocity,in conjunction with the representation theory\cite{Dirac,Dirac-letture}, in order to der…
cond-mat.mtrl-sci2006★ 1 cited
Power and group velocity
Simone Selenu
Here we make use of the Hellmann-Feynman theorem, with the aim to calculate macroscopic quantum velocities instead of forces, and we show how it is possible to derive the expressio…