Abstract： In this paper, a new variational ground state of strong electron-phonon interacting system is proposed, in which the electron subsystem is in superconducting pairing state and the phonon subsystem in two -phonon coherent state. We show that such a variational state is necessary for obtaining a superconducting condensation energy with reasonable magnitude and for the effective mass of the charge carriers not being too large.
郑杭. 关于强电声子耦合系统基态的一个注记. 物理学报, 1988, 37(9): 1555.
Cite this article:
ZHENG HANG. A NOTE ON THE GROUND STATE OF STRONG ELECTRON-PHONON INTERACTING SYSTEM. Acta Phys. Sin., 1988, 37(9): 1550-1555.