Interplay between energy dissipation and reservoir-induced thermalization in nonequilibrium quantum nanodevices

[Article] Interplay between energy dissipation and reservoir-induced thermalization in nonequilibrium quantum nanodevices

Theory of nonequilibrium quantum transport and energy dissipation in terahertz quantum cascade lasers

We analyze theoretically several crucial performance aspects of terahertz quantum cascade lasers, such as the impact of doping on the threshold current, the relative importance of the various scattering mechanisms, and the balance of coherent transport and realistic energy dissipation. We have developed a fully self-consistent model for stationary charge transport based on nonequilibrium Green’...

Interplay between quantum dissipation and an in-plane magnetic field in the spin ratchet effect

We investigate the existence of the pure spin ratchet effect in a dissipative quasi-one-dimensional system with Rashba spin-orbit interaction. The system is additionally placed into a transverse uniform stationary in-plane magnetic field. It is shown that the effect exists at low temperatures and pure spin currents can be generated by applying an unbiased ac driving to the system. An analytical...

Energy relaxation and thermalization of hot electrons in quantum wires.

We develop a theory of energy relaxation and thermalization of hot carriers in clean quantum wires. Our theory is based on a controlled perturbative approach for large excitation energies and emphasizes the important roles of the electron spin and finite temperature. Unlike in higher dimensions, relaxation in one-dimensional electron liquids requires three-body collisions and is much faster for...

Thermal Reservoir coupled to External Field and Quantum Dissipation

In the framework of the Caldeira -Leggett model of dissipative quantum mechanics, we investigate the effects of the interaction of the thermal reservoir with an external field. In particular, we discuss how the interaction modifies the conservative dynamics of the central particle, and the mechanism of dissipation. We briefly comment on possible observable consequencies. PACS numbers: 05.30.-d,...