极化子
物理
准粒子
声子
绝热过程
电子
量子力学
联轴节(管道)
凝聚态物理
希尔伯特空间
绝热定理
材料科学
超导电性
冶金
作者
Li-Chung Ku,S. A. Trugman
标识
DOI:10.1103/physrevb.75.014307
摘要
We calculate the real space and time formation of a polaron quasiparticle from a bare electron. The time-dependent Schr\"odinger equation for the Holstein model of electron-phonon coupling is numerically integrated in a large Hilbert space to obtain the time evolution of the electron and phonon densities and the electron-phonon (el-ph) correlation functions. The quantum dynamical nature of the phonons is preserved. As the el-ph coupling increases, qualitative changes in polaron formation occur when the one-phonon polaron bound state forms. A potential barrier between the quasifree and heavy polaron states exists in dimensions $D\ensuremath{\geqslant}2$, consistent with earlier adiabatic theory. We compare to recent experiments.
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