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Prog. Theor. Phys. Vol. 61 No. 6 (1979) pp. 1569-1583

[ Full Text PDF : FREE ACCESS (1172K) ]

Spectral Analysis of the Velocity Autocorrelation Function of a Model Liquid

Homare Endo and Yoshikazu Endo*

Department of Physics, Hitotsubashi University, Kunitachi-shi, Tokyo 186
*Department of Physics, Tokyo Metropolitan University, Tokyo 158

(Received October 17, 1978)

Abstract:

Studies are made on a spectral analysis of the veolcity autocorrelation function (VAF) obtained by computer simulation by using the method of molecular dynamics. Oscillating bumps are observed in the power spectra by direct cosine transforms of the long data of VAF. To investigate the source of bump, the behaviour of the tail of VAF is studied in detail. This investigation proves that the bumps are raised by the lack of a damping factor of the tail. The unreliable structure is weeded out from the spectrum by applying one of the methods of the spectral analysis of time series, the maximum entropy method, to our system. A strong damping is found in the tail of VAF predicted by the maximum entropy extention.


URL : http://ptp.ipap.jp/link?PTP/61/1569/
DOI : 10.1143/PTP.61.1569

[ Full Text PDF : FREE ACCESS (1172K) ] Citation:

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Citing Article(s) :

  1. Progress of Theoretical Physics Vol. 66 No. 3 (1981) pp. 794-804 :
    Resolution of Velocity Autocorrelation Function of a Model Liquid
    Homare Endo and Yoshikazu Endo

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