Spectral Analysis of the Velocity Autocorrelation Function of a Model Liquid

Autor:	Yoshikazu Endo, Homare Endo
Rok vydání:	1979
Předmět:	Physics Physics and Astronomy (miscellaneous) Series (mathematics) Principle of maximum entropy Autocorrelation Mathematical analysis Damping factor Trigonometric functions Maximum entropy spectral estimation Spectral line Power (physics)
Zdroj:	Progress of Theoretical Physics. 61:1569-1583
ISSN:	1347-4081 0033-068X
DOI:	10.1143/ptp.61.1569
Popis:	Studies are made on a spectral analysis of the velocity autocorrelation function (V AF) 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 V AF predicted by the maximum entropy extention.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b6e02f7a7851dc200bdd5ca0c3caa620 https://doi.org/10.1143/ptp.61.1569 Zobrazit plný text záznamu