Vacuum polarization at finite temperature and density in QED: K. Ahmed and Samina S. Masood. Department of Physics, Quaid-i-Azam University, Islamabad, Pakistan

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 69 KB
• Volume: 207
• Category: Article
• ISSN: 0003-4916
• DOI: 10.1016/0003-4916(91)90188-e

✦ Synopsis

A method for solving the TDHF-equation for the one-particle density matrix is suggested. The density matrix is expanded into Gaussian phase-space densities after a transformation to Wigner space. If the Hartree potential is approximated by a quadratic potential at the centers of the Gaussian density matrices, classical equations of motion are obtained for the phase-space coordinates of the centers. In addition, differential equations of first order have to be solved for the time-dependent expansion coefficients. We give explicit formulae of our method for the case of two colliding atoms (or ions).

Semiclassical

Calculation of Matrix