Computing Absolute Free Energy with Deep Generative Models.

Computing Absolute Free Energy with Deep Generative Models.
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DOI:
10.1021/acs.jpcb.0c08645
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发表时间:
2020-11-12
期刊:
The journal of physical chemistry. B
影响因子:
--
通讯作者:
Zhang B
Zhang B
中科院分区:
其他
文献类型:
--
作者:
Ding X;Zhang B

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Fast and accurate evaluation of free energy has broad applications from drug design to material engineering. Computing the absolute free energy is of particular interest since it allows the assessment of the relative stability between states without intermediates. Here we introduce a general framework for calculating the absolute free energy of a state. A key step of the calculation is the definition of a reference state with tractable deep generative models using locally sampled configurations. The absolute free energy of this reference state is zero by design. The free energy for the state of interest can then be determined as the difference from the reference. We applied this approach to both discrete and continuous systems and demonstrated its effectiveness. It was found that the Bennett acceptance ratio method provides more accurate and efficient free energy estimations than approximate expressions based on work. We anticipate the method presented here to be a valuable strategy for computing free energy differences.
DOI: 10.1016/0021-9991(76)90078-4
发表时间: 1976-01-01
影响因子: 4.1
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