Search
Now showing items 1-3 of 3
Fast quantum noise in the Landau-Zener transition
(American Physical Society, 2007)
We show by direct calculation starting from a microscopic model that the two-state system with time-dependent energy levels in the presence of fast quantum noise obeys the master equation. The solution of master equation ...
Functional Keldysh theory of spin torques
(American Physical Society, 2007)
We present a microscopic treatment of current-induced torques and thermal fluctuations in itinerant ferromagnets based on a functional formulation of the Keldysh formalism. We find that the nonequilibrium magnetization ...
Laser-excited acoustic oscillations in silver and bismuth nanowires
(American Physical Society, 2007)
Coherent acoustic oscillations in Bi and Ag nanowire samples were studied with a femtosecond pump-probe technique and detection of the scattered light. The observed optical and acoustic properties reflect the nanostructure ...