✦ LIBER ✦

Signatures of multiple time-scale behaviour in the power spectra of water

✍ Scribed by Anirban Mudi; Ramakrishna Ramaswamy; Charusita Chakravarty

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 279 KB
Volume: 376
Category: Article
ISSN: 0009-2614
DOI: 10.1016/s0009-2614(03)01006-6

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✦ Synopsis

Power spectra associated with fluctuations in the tagged particle potential and kinetic energies are analysed for bulk SPC/E water for a range of temperatures along the 1.0 g/cm 3 isochore. Fluctuations in the tagged particle potential energies give rise to 1=f a noise, indicative of multiple time-scale behaviour, over a temperature-dependent frequency regime. In contrast, the tagged particle centre-of-mass and rotational kinetic energies, which are indicative of the magnitude of local thermal fluctuations, do not show any evidence of 1=f a behaviour.

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