DOI: 10.1063/1.466707. Separation-shifted scaling, a new scaling method for Lennard-Jones interactions in thermodynamic integration

Separation-shifted scaling, a new scaling method for Lennard-Jones interactions in thermodynamic integration

10.1063/1.466707

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

A new method of simultaneously scaling and shifting the Lennard-Jones (LJ) potential in molecular dynamics (MD) and thermodynamic integration (TI) simulations is presented. The approach allows the smooth creation or annihilation of atoms or molecules in an ensemble of solvent molecules during a molecular simulation. By scaling and shifting the LJ potential in the direction of the interatomic distance between particles, the method eliminates the problem of the creation or annihilation of a large repulsive LJ potential at the initial or final state of a TI. The optimal degree of shifting and scaling the LJ potential as a function of a control variable λ was studied for the annihilation and creation of neon in aqueous solution. The method was further tested on the calculation of the free energy of aqueous solvation of a small molecule, ethanol. In contrast to linear scaling of the LJ potential during TI, the calculated free energies using the new separation-shifted scaling approach are reasonably well converged after 200–500 ps of simulation and show smaller hysteresis comparing forward and reverse TI.

Bibliography

Zacharias, M., Straatsma, T. P., & McCammon, J. A. (1994). Separation-shifted scaling, a new scaling method for Lennard-Jones interactions in thermodynamic integration. The Journal of Chemical Physics, 100(12), 9025â9031.

Authors 3

M. Zacharias (first)
T. P. Straatsma (additional)
J. A. McCammon (additional)

References 24 Referenced 481

{'key': '2024021022115469100_r1'}
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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:02 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 5:12 p.m.)
Indexed	1 week ago (Aug. 23, 2025, 9:11 p.m.)
Issued	31 years, 2 months ago (June 15, 1994)
Published	31 years, 2 months ago (June 15, 1994)
Published Print	31 years, 2 months ago (June 15, 1994)

Funders 0

None

BibTeX

@article{Zacharias_1994, title={Separation-shifted scaling, a new scaling method for Lennard-Jones interactions in thermodynamic integration}, volume={100}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.466707}, DOI={10.1063/1.466707}, number={12}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Zacharias, M. and Straatsma, T. P. and McCammon, J. A.}, year={1994}, month=jun, pages={9025–9031} }

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