Accurate and efficient corrections for missing dispersion interactions in molecular simulations

Michael R. Shirts, David L. Mobley, John D. Chodera, and Vijay S. Pande.  
J. Phys. Chem. B 111:13052, 2007. [DOI] [PDF]

We identify a major source of systematic error in absolute alchemical free energy calculations of ligand binding and show how a simple procedure can inexpensively and accurately eliminate it.