Real Time Correlation Functions at Finite Temperature and their Classical Limit

1997/08/15 by D. B"odeker, B"odeker, D.
Economics, Econometrics and Finance · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Quantum Mechanics and Applications #Stochastic processes and financial applications #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9708360

6 pages, Talk given at the E"otv"os Conference in Science: Strong and Electroweak Matter, Eger, Hungary, 21-25 May 1997

arxiv created 1997/08/15 · openalex publication_date 1997/08/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

In order to investigate the reliability of the classical approximation for non-perturbative real time correlation functions at finite temperature we study the two-point correlator for the anharmonic oscillator. For moderately large times the classical limit gives a good approximation of the quantum result but after some time t_* the classical approximation breaks down even at high temperature.

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