CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water
Zhu, Z; Sheng, N; Wan, RZ; Fang, HP; fanghaiping@sinap.ac.cn
2014
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY A
ISSN1089-5639
Volume118Issue:39Pages:8936—8941
AbstractWhether thermal noise is colored or white is of fundamental importance. In conventional theory, thermal noise is usually treated as white noise so that there are no directional transportations in the asymmetrical systems without external inputs, since only the colored fluctuations with appropriate autocorrelation time length can lead to directional transportations in the asymmetrical systems. Here, on the basis of molecular dynamics simulations, we show that the autocorrelation time length of thermal noise in water is similar to 10 ps at room temperature, which indicates that thermal noise is not white in the molecular scale while thermal noise can be reasonably assumed as white in macro- and meso-scale systems. The autocorrelation time length of thermal noise is intrinsic, since the value is almost unchanged for different temperature coupling methods. Interestingly, the autocorrelation time of thermal noise is correlated with the lifetime of hydrogen bonds, suggesting that the finite autocorrelation time length of thermal noise mainly comes from the finite lifetime of the interactions between neighboring water molecules.
KeywordCarbon Nanotube Membranes Molecular-dynamics Method Hydrogen-bond Liquid Water Transport Distributions Equilibrium Simulations Conduction Ratchets
Indexed BySCI
Language英语
WOS IDWOS:000342651200007
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14203
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorfanghaiping@sinap.ac.cn
Recommended Citation
GB/T 7714
Zhu, Z,Sheng, N,Wan, RZ,et al. Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2014,118(39):8936—8941.
APA Zhu, Z,Sheng, N,Wan, RZ,Fang, HP,&fanghaiping@sinap.ac.cn.(2014).Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water.JOURNAL OF PHYSICAL CHEMISTRY A,118(39),8936—8941.
MLA Zhu, Z,et al."Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water".JOURNAL OF PHYSICAL CHEMISTRY A 118.39(2014):8936—8941.
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