|Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water|
|Zhu, Z; Sheng, N; Wan, RZ; Fang, HP; email@example.com
|Source Publication||JOURNAL OF PHYSICAL CHEMISTRY A
|Abstract||Whether 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.|
|Keyword||Carbon Nanotube Membranes
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.
Zhu, Z,Sheng, N,Wan, RZ,Fang, HP,&firstname.lastname@example.org.(2014).Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water.JOURNAL OF PHYSICAL CHEMISTRY A,118(39),8936—8941.
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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