Kinetic Theory for Electron Dynamics in Semiconductors and Plasmas

E. Heiner

M. Bönitz, D. Semkat

Nonequilibrium Green's Functions: History, General Problems, Plasmas: Real-Time Nonequilibrium Green's Functions (L V Keldysh) Theory of High-Tc Superconductivity in Layered Cuprates (A A Abrikosov) Correlated Quantum Plasmas in Strong Laser Fields (M Schlanges et al.) Quantum Transport in Semiconductors: Non-Equilibrium Green's Functions in Semiconductor Device Modeling (R Lake et al.) Nonequilibrium Green Function Modelling of Transport in Mesoscopic Systems (A-P Jauho) Bohm Trajectories in Quantum Transport (J R Barker) Optical and Electronic Properties of Semiconductors: Coulomb Correlations in the Quantum Kinetics of Electron Phonon Systems (W Schafer et al.) Excitonic Quantum Coherences and Correlations in Semiconductor Quantum Wells (R Binder et al.) Nuclear Matter and High Energy Physics: Renormalization of Self-Consistent F-Derivable Approximations (H van Hees & J Knoll) Crossover from Neutron-Proton Superfluidity to Bose-Einstein Condensation of Deuterons in Nuclear Matter (A A Isayev) Kinetics of Vacuum Pair Creation in Strong Electromagnetic Fields (A V Tarakanov et al.) Alternative Computational Methods: Time-Dependent Density Functional Theory from a Practitioners Perspective (K Andrae et al.) Combination of Quantum Kinetic Theory and First-Principle Simulations for Strongly Correlated Quantum Plasmas (M Bonitz et al.) Tunneling of Interacting Identical Particles (Yu E Lozovik et al.) and other papers.

Volkhard May

Arie‐Willem de Leeuw, E. C. I. van der Wurff, R. A. Duine +2 more

We construct a theory for Bose-Einstein condensation of light in nanofabricated semiconductor microcavities. We model the semiconductor by one conduction and one valence band which consist of electrons and holes that interact via a Coulomb interaction. Moreover, we incorporate screening effects by using a contact interaction with the scattering length for a Yukawa potential and describe in this manner the crossover from exciton gas to electron-hole plasma as we increase the excitation level of the semiconductor. We then show that the dynamics of the light in the microcavities is damped due to the coupling to the semiconductor. Furthermore, we demonstrate that on the electron-hole plasma side of the crossover, which is relevant for the Bose-Einstein condensation of light, this damping can be described by a single dimensionless damping parameter that depends on the external pumping. Hereafter, we propose to probe the superfluidity of light in these nanofabricated semiconductor microcavities by making use of the differences in the response in the normal or superfluid phase to a sudden rotation of the trap. In particular, we determine frequencies and damping of the scissors modes that are excited in this manner. Moreover, we show that a distinct signature of the dynamical Casimir effect can be observed in the density-density correlations of the excited light fluid.

Yeongsun Lee, Pavel Aleynikov, Jong-Kyu Park

Fast electrons in partially ionized plasmas lose energy through inelastic collisions with bound electrons. While the mean energy loss is well described by stopping-power theory, fluctuations associated with discrete excitation and ionization events produce energy straggling and an additional longitudinal diffusion in momentum space. We incorporate this effect into fast-electron kinetics through a derived Fokker-Planck operator whose coefficients are obtained from ab initio quantum many-body simulations. We demonstrate that neglecting inelastic energy diffusion in partially ionized D-Ar plasmas can underestimate primary runaway-electron generation by several orders of magnitude.

K. Henneberger, Volkhard May