Jarzynski Equality — Nonequilibrium Free Energy Recovery
⟨e^{−βW}⟩ = e^{−βΔF} — free energy from irreversible work measurements
⟨e^{−W/kT}⟩ = e^{−ΔF/kT} | Dissipated work: ⟨W_diss⟩ = ⟨W⟩ − ΔF ≥ 0 (2nd law)
Pulling speed v
1.0
Temperature kT
1.0
Friction γ
1.0
Run N=200 Trajectories
Each trajectory: overdamped particle in changing potential
⟨W⟩ mean work
—
ΔF (Jarzynski)
—
⟨W_diss⟩
—
True ΔF
—