TY - JOUR
T1 - Satisfying the fluctuation theorem in free-energy calculations with Hamiltonian replica exchange
AU - Wyczalkowski, Matthew A.
AU - Pappu, Rohit V.
PY - 2008/2/20
Y1 - 2008/2/20
N2 - An error measure, referred to as the hysteresis error, is developed from the Crooks fluctuation theorem to evaluate the sampling quality in free-energy calculations. Theory and the numerical free energy of hydration calculations are used to show that Hamiltonian replica exchange provides a direct route for minimizing the hysteresis error. Replica exchange swap probabilities yield the rate at which the hysteresis error falls with the simulation length, and this result can be used to decrease bias and statistical errors associated with free-energy calculations based on multicanonical simulations.
AB - An error measure, referred to as the hysteresis error, is developed from the Crooks fluctuation theorem to evaluate the sampling quality in free-energy calculations. Theory and the numerical free energy of hydration calculations are used to show that Hamiltonian replica exchange provides a direct route for minimizing the hysteresis error. Replica exchange swap probabilities yield the rate at which the hysteresis error falls with the simulation length, and this result can be used to decrease bias and statistical errors associated with free-energy calculations based on multicanonical simulations.
UR - http://www.scopus.com/inward/record.url?scp=40549083345&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.77.026104
DO - 10.1103/PhysRevE.77.026104
M3 - Article
C2 - 18352087
AN - SCOPUS:40549083345
SN - 1539-3755
VL - 77
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 2
M1 - 026104
ER -