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Title: Accelerating ring-polymer molecular dynamics with parallel-replica dynamics

Journal Article · · Journal of Chemical Physics
DOI:https://doi.org/10.1063/1.4954311· OSTI ID:1499336
 [1];  [2];  [2]
  1. Stanford Univ., CA (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division

Nuclear quantum effects are important for systems containing light elements, and the effects are more prominent in the low temperature regime where the dynamics also becomes sluggish. Here, we show that parallel replica (ParRep) dynamics, an accelerated molecular dynamics approach for infrequent-event systems, can be effectively combined with ring-polymer molecular dynamics, a semiclassical trajectory approach that gives a good approximation to zero-point and tunneling effects in activated escape processes. The resulting RP-ParRep method is a powerful tool for reaching long time scales in complex infrequent-event systems where quantum dynamics are important. Two illustrative examples, symmetric Eckart barrier crossing and interstitial helium diffusion in Fe and Fe–Cr alloy, are presented to demonstrate the accuracy and long-time scale capability of this approach.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001; AC52-06NA25396
OSTI ID:
1499336
Alternate ID(s):
OSTI ID: 1421170
Report Number(s):
LA-UR-16-22740
Journal Information:
Journal of Chemical Physics, Vol. 144, Issue 24; ISSN 0021-9606
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

References (42)

Helium and hydrogen effects on the embrittlement of iron- and nickel-based alloys journal March 1991
Communication: Relation of centroid molecular dynamics and ring-polymer molecular dynamics to exact quantum dynamics journal May 2015
Statistical mechanics of isomerization dynamics in liquids and the transition state approximation journal January 1978
Space-Time Approach to Non-Relativistic Quantum Mechanics journal April 1948
Quantum diffusion of hydrogen and muonium atoms in liquid water and hexagonal ice journal May 2008
Quantum statistics and classical mechanics: Real time correlation functions from ring polymer molecular dynamics journal August 2004
On the relation between thermostatted ring-polymer molecular dynamics and exact quantum dynamics journal January 2016
Derivation of a true ( t → 0 + ) quantum transition-state theory. I. Uniqueness and equivalence to ring-polymer molecular dynamics transition-state-theory journal February 2013
Bimolecular reaction rates from ring polymer molecular dynamics journal May 2009
Bimolecular reaction rates from ring polymer molecular dynamics: Application to H + CH 4 → H 2 + CH 3 journal January 2011
On the uniqueness of t → 0 + quantum transition-state theory journal August 2013
Diffusion and Clustering of Helium in Noble Metals book January 1991
A mathematical formalization of the parallel replica dynamics journal January 2012
Helium accumulation in metals during irradiation – where do we stand? journal December 2003
Exploiting the isomorphism between quantum theory and classical statistical mechanics of polyatomic fluids journal April 1981
The blistering of stainless steel (0Cr16Ni15Mo3Nb) under simultaneous D+ and He+ ions irradiation journal October 1980
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Advanced materials for fusion technology journal November 2005
The effect of hydrogen and helium on microvoid formation in iron and nickel journal December 2002
An integrated model for materials in a fusion power plant: transmutation, gas production, and helium embrittlement under neutron irradiation journal August 2012
The Penetration of a Potential Barrier by Electrons journal June 1930
Helium embrittlement of iron-chromium alloys journal January 1983
Fast three dimensional migration of He clusters in bcc Fe and Fe–Cr alloys journal May 2009
The parallel replica dynamics method – Coming of age journal April 2015
The properties of hydrogen and helium under extreme conditions journal November 2012
A quantum‐statistical Monte Carlo method; path integrals with boundary conditions journal March 1979
A climbing image nudged elastic band method for finding saddle points and minimum energy paths journal December 2000
Ring-Polymer Molecular Dynamics: Quantum Effects in Chemical Dynamics from Classical Trajectories in an Extended Phase Space journal April 2013
Boltzmann-conserving classical dynamics in quantum time-correlation functions: “Matsubara dynamics” journal April 2015
Efficient implementation of the concentration-dependent embedded atom method for molecular-dynamics and Monte-Carlo simulations journal July 2009
Surface Diffusion of Hydrogen on Ni(100) from Ring Polymer Molecular Dynamics journal May 2012
Convenient and accurate discretized path integral methods for equilibrium quantum mechanical calculations journal August 1981
Proton transfer in a polar solvent from ring polymer reaction rate theory journal April 2008
Study of an F center in molten KCl journal January 1984
Helium precipitation in α-Fe journal March 1982
An efficient ring polymer contraction scheme for imaginary time path integral simulations journal July 2008
Accurate sampling using Langevin dynamics journal May 2007
Chemical reaction rates from ring polymer molecular dynamics journal February 2005
The effect of tensile stress on the growth of helium bubbles in an austenitic stainless steel journal September 1979
Parallel replica method for dynamics of infrequent events journal June 1998
Helium effects on the creep and fatigue resistance of austenitic stainless steels at high temperatures journal January 1985
A refined ring polymer contraction scheme for systems with electrostatic interactions journal October 2008