Response to “Comment on ‘Markovian approximation in a coarse-grained description of atomic systems’ ” [J. Chem. Phys. 128, 147101 (2008)]

Response to “Comment on ‘Markovian approximation in a coarse-grained description of atomic systems’ ” [J. Chem. Phys. 128, 147101 (2008)]
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对“原子系统粗粒度描述中的马尔可夫近似的评论”[J. Phys. 128, 147101 (2008)]

DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
P. Español
P. Español
中科院分区:
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文献类型:
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作者:
Carmen Hijón;M. Serrano;P. Español

文献摘要

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我们表明,在森理论的投影算子,格林-久保公式使用微观,而不是预测的力量是唯一有效的,如果描述是马尔可夫。因此,评估一个描述是否是马尔可夫的唯一方法是通过检查在马尔可夫假设下的理论预测。虽然,在原则上,一个一维链的斑点描述是非马尔可夫的,在实践中,马尔可夫近似合理地描述链的粗糙动态。
We show within the Mori theory of projection operators that the Green-Kubo formula using microscopic rather than projected forces is only valid if the description is Markovian. Therefore, the only way to assess whether a description is Markovian is through examining the predictions of the theory under the Markovian assumption. Although, in principle, the blob description for a unidimensional chain is non-Markovian, in practice the Markovian approximation describes reasonably well the coarse dynamics of the chain.