Stochastic Fluctuations and Chiral Symmetry Breaking: Exact Solution of Lente Model

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• 作者：Jiushu Shao ; Lan Liu
• 刊名：Journal of Physical Chemistry A
• 出版年：2007
• 出版时间：September 27, 2007
• 年：2007
• 卷：111
• 期：38
• 页码：9570 - 9572
• 全文大小：40K
• 年卷期：v.111,no.38(September 27, 2007)
• ISSN：1520-5215

文摘

The stochastic description for the autocatalytic process has been proposed by Lente (J. Phys. Chem. A 2004,108, 9475) to demonstrate chiral symmetry breaking. He assumed that the number of reacting molecules ismacroscopic and that no products are present initially. The Lente model consisting of a finite number ofmolecules that may include the product molecules as chiral seeds is explored and the characteristics of stochasticdistributions of the product are examined. It is shown that the presence of racemic product in the substratereduces the possibility of chiral symmetry breaking while a few more molecules of a specific enantiomeradded can yield chiral dominance for strong autocatalysis. Besides, small reactive volumes or dense reactantconcentrations have a preference for chiral symmetric breaking.