Low Temperature Physics: 30, 661 (2004); https://doi.org/10.1063/1.1789939 (6 pages)
Физика Низких Температур: Том 30, Выпуск 7-8 (Июль 2004), c. 874-880    ( к оглавлению , назад )

Wigner distribution function formalism for superconductors and collisionless dynamics of the superconducting order parameter

M.H.S. Amin

D-Wave Systems Inc., 320-1985 W. Broadway, Vancouver, B.C. , V6J 4Y3 Canada

E.V. Bezuglyi, A.S. Kijko, and A.N. Omelyanchouk

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Science of Ukraine, 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: bezugly@ilt.kharkov.ua

Received April 16, 2004


A technique for studying collisionless dynamics of a homogeneous superconducting system is developed which is based on Riccati parametrization of the Wigner distribution function. The quantum evolution of the superconducting order parameter, initially deviating from the equilibrium value, is calculated using this technique. The effect of a time-dependent BCS paring interaction on the dynamics of the order parameter is also studied.

74.20.-z - Theories and models of superconducting state
74.25.-q - Properties of type I and type II superconductors