Open AccessVARIATIONAL STUDY OF A DISSIPATIVE QUANTUMTUNNELING SYSTEM
Author(s) -
Yanling Shi,
Chang Seop Hong,
Xiang Wang
Publication year - 1993
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.42.1162
Subject(s) - dissipative system , phonon , ground state , quantum tunnelling , physics , delocalized electron , coupling (piping) , condensed matter physics , displacement (psychology) , variational method , quantum mechanics , quantum , materials science , psychology , metallurgy , psychotherapist
The ground states of phonons in a dissipative quantum tunneling system and their influences on the localiza ion-delocalization transtion are investigated by a variational approach. We find that: 1. There are two kind of influences, displacement and deformation, on phonon states due to coupling with a tunneling particle, and displaced -squeezed states are proposed to describe both these influences. 2. The localization-delocahzation transition depends on the choice of phonon ground state. The transition will occur at strong coupling as the energy of the ground state decreases.