Quantum–classical transition in the Caldeira–Leggett model

Journal Article · Sun Jan 15 04:00:00 EST 2017 · Annals of Physics

DOI:https://doi.org/10.1016/J.AOP.2016.12.010· OSTI ID:22617455

Kovács, J. ^[1]; Fazekas, B. ^[2]; Sailer, K. ^[1]

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1. Department of Theoretical Physics, University of Debrecen, P.O. Box 5, H-4010 Debrecen (Hungary)
2. Institute of Mathematics, University of Debrecen, P.O. Box 12, H-4010 Debrecen (Hungary)

The quantum–classical transition in the Caldeira–Leggett model is investigated in the framework of the functional renormalization group method. It is shown that a divergent quadratic term arises in the action due to the heat bath in the model. By removing the divergence with a frequency cutoff we considered the critical behavior of the model. The critical exponents belonging to the susceptibility and the correlation length are determined and their independence of the frequency cutoff and the renormalization scheme is shown.

• OSTI ID: 22617455
• Journal Information: Annals of Physics, Journal Name: Annals of Physics Vol. 376; ISSN 0003-4916; ISSN APNYA6
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CLASSICAL MECHANICS
QUANTUM SYSTEMS
RENORMALIZATION