scholarly journals Nonequilibrium dynamics of strings in time-dependent plane wave backgrounds

2012 ◽  
Vol 859 (3) ◽  
pp. 269-287 ◽  
Author(s):  
R. Nardi ◽  
I.V. Vancea
Keyword(s):  
Plane Wave ◽  
Time Dependent ◽  
Nonequilibrium Dynamics

ODE integration schemes for plane-wave real-time time-dependent density functional theory

2019 ◽  
Vol 150 (1) ◽  
pp. 014101 ◽  
Author(s):  
Daniel A. Rehn ◽  
Yuan Shen ◽  
Marika E. Buchholz ◽  
Madan Dubey ◽  
Raju Namburu ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Plane Wave ◽  
Real Time ◽  
Density Functional ◽  
Time Dependent ◽  
Functional Theory ◽  
Integration Schemes ◽  
Dependent Density

The propagation of a transverse electromagnetic wave in a nonlinear, anisotropic, time-dependent plasma medium

1968 ◽  
Vol 46 (7) ◽  
pp. 889-905
Author(s):  
Robert J. Papa
Keyword(s):  
Energy Balance ◽  
Plane Wave ◽  
Electron Temperature ◽  
Electron Density ◽  
Balance Equation ◽  
Energy Balance Equation ◽  
Time Dependent ◽  
Time Varying ◽  
Circularly Polarized ◽  
Elliptically Polarized

In a previous paper, a one-dimensional, inhomogeneous model was considered in describing the nonlinear interaction of a radiofrequency plane wave with a time-varying plasma. This paper extends the analysis to the anisotropic case, in which an elliptically polarized plane wave incident upon an electron-density profile induces changes in the electron density and electron temperature. A d-c. magnetic field parallel to the electron-density gradients causes the elliptically polarized wave to split into two distinct modes, a right-hand circularly polarized and a left-hand circularly polarized mode. The two modes are coupled through an energy-balance equation that governs the behavior of the electron temperature. The time-dependent response of the plasma may be found by numerically integrating an energy-balance equation and a continuity equation. The solution to the wave equation for the time-varying, inhomogeneous, anisotropic medium may be obtained through the use of the WKB approximation. The time scales for electron-temperature and electron-density changes are found to vary with incident flux, incident-wave ellipticity, and appropriate normalized plasma parameters.

scholarly journals REAL-TIME NONEQUILIBRIUM DYNAMICS IN HOT QED PLASMAS

2001 ◽  
Vol 16 (supp01c) ◽  
pp. 1281-1283
Author(s):  
SHANG-YUNG WANG
Keyword(s):  
Renormalization Group ◽  
Real Time ◽  
Time Dependent ◽  
Nonequilibrium Dynamics ◽  
Group Method ◽  
Renormalization Group Method ◽  
Photon Distribution ◽  
Relaxation Time Approximation ◽  
Kinetics Of ◽  
Shell Energy

The quantum kinetics of photons in hot QED plasmas is studied directly in real time by implementing the dynamical renormalization group. In contrast to conventional approach, the dynamical renormalization group method consistently includes off-shell (energy non-conserving) effects and accounts for time-dependent collisional kernel. To lowest order we find that in the relaxation time approximation the semihard photon distribution function relaxes with a power law.

Diffraction of a cylindrical pulse by a metallic half plane

1980 ◽  
Vol 58 (4) ◽  
pp. 433-442
Author(s):  
A. Chakrabarti ◽  
V. V. S. S. Sastry
Keyword(s):  
Plane Wave ◽  
Half Plane ◽  
Time Dependent ◽  
Incident Plane Wave ◽  
Total Field ◽  
Time Harmonic ◽  
Incident Plane ◽  
Time Dependent Problem ◽  
General Time

A direct transform technique is applied to the initial and boundary value problem involving diffraction of a cylindrical pulse by a half plane, on which impedance type of boundary conditions must be met by the total field. The solution to the time harmonic incident plane wave is deduced as a particular case of the general time-dependent problem considered here and we avoid the Wiener–Hopf technique which leads to very complicated factorization and which masks the role of the impedance factor Z′ (a small quantity) in the expression for the scattered field.

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