耗散量子隧道系统的变分法研究

本文用变分法研究了耗散量子系统中的声于基态及其对局域一退局域相变条件的影响.发现: 1. 声子基态不仅存在通常的位移效应, 而且还有形变效应. 本文提出的位移一压缩态可同时描述这两种效应; 2. 声子基态的选择对相变条件有很大影响.随着声子基态能量下降,相变曲线将向强祸合方向移动. 关键词：

VARIArl0NAL STUDY OF ADISSIPATIVE QUANTUM TUNNELING SYSTEM

The ground states of phonons in dissipative quantum tunneling system and their influences on the localization delocalization transition are investigated by a variational approach. We find that: 1.There are two kind of influences, displacement and deformation, on phonon describe both these influences. 2. The localization-delocalization transition depends on the choice of phonon ground state. The transition will occur at strong coupling as the energy of the ground state decreases.
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