PlumX Metrics
Embed PlumX Metrics

Perturbation and variational-perturbation method for the free energy of anharmonic oscillators

Canadian Journal of Physics, ISSN: 0008-4204, Vol: 85, Issue: 1, Page: 13-30
2007
  • 3
    Citations
  • 0
    Usage
  • 3
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

Article Description

The perturbation and the variational-perturbation methods are applied for calculating the partition function of one-dimensional oscillators with anharmonicity x. New formally simple expressions for the free energy and for the Rayleigh-Schrödinger energy corrections are derived. It is shown that the variational-perturbation method overcomes all the deficiencies of the conventional perturbation method. The results of fifth-order numerical calculations for the free energy of the quartic, quartic-sextic, and octic anharmonic oscillator are highly accurate in the whole range of temperatures. © 2007 NRC Canada.

Bibliographic Details

K. Vlachos; V. Papatheou; A. Okoplńska

Canadian Science Publishing

Physics and Astronomy

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know