We argue that the apparent failure of the work-Hamiltonian connection for free energy calculations reported by Vilar and Rubi' (cond-mat arXiv:0704.0761v2) stems from their incorrect expression for the work.
Failure of the work-Hamiltonian connection for free energy calculations
Free energy calculations along entropic pathways: I. Homogeneous vapor-liquid nucleation for atomic and molecular systems
A Variational Approach to Enhanced Sampling and Free Energy Calculations
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