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Effective mass approximation for tunneling states with dissipation
Author(s) -
Chen Hong,
Wu Xiang
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221520212
Subject(s) - dissipative system , dissipation , quantum tunnelling , effective mass (spring–mass system) , partition function (quantum field theory) , physics , condensed matter physics , effective temperature , quantum mechanics , spectral line
The dissipative tunneling in a symmetric double‐well potential is studied at low temperatures. Using effective mass approximation, the dissipation can be replaced by a temperature‐dependent effective mass. The effective mass increases with decreasing temperature and becomes infinite at T = 0. The partition function of the system is derived, which has the same form as that of a non‐dissipative tunneling system. Some possible applications in glasses and heavy Fermion systems are also discussed.