Reply to Comment on "Failure of the work-Hamiltonian connection for free-energy calculations" by Horowitz and Jarzynski

Details Reply to Comment on "Failure of the work-Hamiltonian connection for free-energy calculations" by Horowitz and Jarzynski Reply to Comment on "Failure of the work-Hamiltonian connection for free-energy calculations" by Horowitz and Jarzynski

2008-08-24

arxiv.org/abs/0808.3271v1

Physics

Condensed Matter

Statistical Mechanics

To appear in Physical Review Letters

Scientific paper

We show that the Comment [arXiv:0808.1224] by Horowitz and Jarzynski obtains as a main result a general free energy change for a harmonic system that in the macroscopic limit does not recover the textbook expression for the energy change of a Hookean spring. The reason is that Horowitz and Jarzynski improperly identify work with parametric changes of the Hamiltonian instead of with the standard quantity, force times displacement.

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