Classical and quantum chaotic angular-momentum pumps
arXiv:1411.2659 · doi:10.1103/PhysRevLett.114.094101
Abstract
We study directed transport of charge and intrinsic angular momentum by periodically driven scattering in the regime of fast and strong driving. A spin-orbit coupling through a kicked magnetic field confined to a compact region in space leads to irregular scattering and triggers spin flips in a spatially asymmetric manner which allows to generate polarized currents. The dynamical mechanisms responsible for the spin separation carry over to the quantum level and give rise to spin pumping. Our theory, based on the Floquet formalism, is confirmed by numerical solutions of the time-dependent inhomogeneous Schrödinger equation with a continuous source term.
5 pages, 4 figures
References in corpus (7)
- Directed Chaotic Transport in Hamiltonian Ratchets
- Coherent spin ratchets: A spin-orbit based quantum ratchet mechanism for spin-polarized currents in ballistic conductors
- Quantum pumping of electrons by a moving modulated potential
- Spin-Orbit Based Coherent Spin Ratchets
- Solving the time-dependent Schrödinger equation with absorbing boundary conditions and source terms in Mathematica 6.0
- Nonadiabatic pumping in classical and quantum chaotic scatterers
- Pumping angular momentum by driven chaotic scattering