Physics – Quantum Physics
Scientific paper
2005-05-06
J.Chem.Phys. 122 (2005) 174104
Physics
Quantum Physics
REVTeX4, 18 pages, 9 eps figures
Scientific paper
10.1063/1.1888576
We apply the effective potential analytic continuation (EPAC) method to the calculation of real time quantum correlation functions involving operators nonlinear in the position operator $\hat{q}$. For a harmonic system the EPAC method provides the exact correlation function at all temperature ranges, while the other quantum dynamics methods, the centroid molecular dynamics and the ring polymer molecular dynamics, become worse at lower temperature. For an asymmetric anharmonic system, the EPAC correlation function is in very good agreement with the exact one at $t=0$. When the time increases from zero, the EPAC method gives good coincidence with the exact result at lower temperature. Finally, we propose a simplified version of the EPAC method to reduce the computational cost required for the calculation of the standard effective potential.
Horikoshi Atsushi
Kinugawa Kenichi
No associations
LandOfFree
Effective potential analytic continuation approach for real time quantum correlation functions involving nonlinear operators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effective potential analytic continuation approach for real time quantum correlation functions involving nonlinear operators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effective potential analytic continuation approach for real time quantum correlation functions involving nonlinear operators will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-693947