Open AccessVARIATIONAL STUDY ON CORRELATED-SQUEEZED GROUND STATE OF QUANTUM TUNNELING SYSTEM INTERACTING WITH TWO PHONONS
Author(s) -
Gao Yang,
Yumei Zhang
Publication year - 1999
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.48.1340
Subject(s) - phonon , physics , ground state , quantum tunnelling , condensed matter physics , quantum , quantum mechanics , mode (computer interface) , computer science , operating system
The variational approach is applied to the study of the ground state of quantum tunneling system interacting with two phonons by use of a correlated-squeezed transformation. We fine: 1) For the two phonons bath, the ground state energy of the phonons with correlation effect is lower than that without correlation effect; 2) The effect of correlation varies with the mode parameters: In the resonant regime of the phonons and two-state system, the correlation effect is more significant and will be strengthened together with the increase of coupling coefficient.