Variational theory of multicomponent quantum fluids: An application to positron-electron plasmas at T=0
Abstract
Variational many-body theory is employed to study ground-state properties of hypothetical positron-electron plasmas. We make use of the multicomponent Fermi hypernetted-chain method to calculate the energy and pair-correlation functions of this system. Optimization of the trial wave function is performed through solving a set of approximate Euler-Lagrange equations for the pair distribution functions. Electron densities are chosen to be in the metallic range, and several concentrations of positrons are considered. At fifty-fifty concentration this system represents an idealized model of the electron-hole liquid and at the limit of zero concentration we have a single positron impurity in an electron gas. Results of this work support earlier theoretical predictions for the model electron-hole liquid and are in good agreement with available experimental evidence for both the electron-hole liquid and the single positron impurity.
- Publication:
-
Physical Review B
- Pub Date:
- October 1987
- DOI:
- 10.1103/PhysRevB.36.5160
- Bibcode:
- 1987PhRvB..36.5160L
- Keywords:
-
- 67.90.+z;
- 05.30.Fk;
- 71.45.Gm;
- Other topics in quantum fluids and solids;
- liquid and solid helium;
- Fermion systems and electron gas;
- Exchange correlation dielectric and magnetic response functions plasmons