Browsing by Keywords "Superfluid weight"
Now showing items 1-2 of 2
-
Current response in extended systems as a geometric phase: Application to variational wavefunctions
(Journal of the Physical Society of the Japan, 2012)The linear response theory for current is investigated in a variational context. Expressions are derived for the Drude and superfluid weights for general variational wavefunctions. The expression for the Drude weight ... -
Drude and Superfluid Weights in Extended Systems: The Role of Discontinuities and δ-Peaks in the One-and Two-Body Momentum Densities
(Institute of Pure and Applied Physics, 2012-01-05)The question of conductivity is revisited. Using the total momentum shift operator to construct the perturbed many-body Hamiltonian and ground state wave function the second derivative of the ground state energy with respect ...
