A quasi-classical approximation for autocorrelation functions

Seon Woog Cho, Kenneth G. Kay

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A quasi-classical approximation is presented for the calculation of time autocorrelation functions of properties of bound molecular systems. In this treatment, classical motion is restricted to quantized invariant tori on a discretized energy shell. The dynamics on these tori is obtained by the adiabatic switching technique. When applied to the Henon-Heiles system, the quasi-classical approximation is sometimes found to yield significantly better agreement with the quantum results than that obtained from conventional classical calculations.

Original languageEnglish
Pages (from-to)602-607
Number of pages6
JournalJournal of Physical Chemistry
Issue number3
StatePublished - 1988


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