Open AccessVARIATIONAL STUDY FOR A COUPLED SYSTEM OF A QUANTUM TUNNELING STATE WITH PHONONS
Author(s) -
Yanling Shi,
Yi-Hang Nie,
Chang Seop Hong,
Xiang Wu
Publication year - 1992
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.41.1499
Subject(s) - ground state , quantum tunnelling , physics , phonon , state (computer science) , transition of state , variational method , quantum phase transition , coupling (piping) , squeezed coherent state , quantum , quantum mechanics , condensed matter physics , coherent states , materials science , computer science , algorithm , metallurgy
The ground state energy of a coupled system of a quantum tunneling state with phonons is investegated by a variational approach. We find that the ground state of the system may be described by two variation states-displaced state and displaced-squeezed state, and the transition of the stable ground state from displaced state to displaced-squeezed state will occur as coupling strength increases. The phase diagram of the transition is also given.