We present a novel theoretical formulation for performing quantum dynamics in terms of moments within the single-particle description. By expressing the quantum dynamics in terms of increasing orders of moments, instead of single-particle wave functions as generally done in time-dependent density functional theory, we describe an approach for reducing the high computational cost of simulating the quantum dynamics. The equation of motion is given for the moments by deriving analytical expressions for the first-order and second-order time derivatives of the moments, and a numerical scheme is developed for performing quantum dynamics by expanding the moments in the Taylor series as done in classical molecular dynamics simulations. We propose a few numerical approaches using this theoretical formalism on a simple one-dimensional model system, for which an analytically exact solution can be derived. The application of the approaches to an anharmonic system is also discussed to illustrate their generality. We also discuss the use of an artificial neural network model to circumvent the numerical evaluation of the second-order time derivatives of the moments, as analogously done in the context of classical molecular dynamics simulations.
Skip Nav Destination
,
,
,
,
CHORUS
Article navigation
14 February 2024
Research Article|
February 13 2024
Theory of moment propagation for quantum dynamics in single-particle description Available to Purchase
Nicholas J. Boyer
;
Nicholas J. Boyer
(Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Visualization, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
Search for other works by this author on:
Christopher Shepard
;
Christopher Shepard
(Formal analysis, Visualization, Writing – review & editing)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
Search for other works by this author on:
Ruiyi Zhou
;
Ruiyi Zhou
(Formal analysis, Writing – review & editing)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
Search for other works by this author on:
Jianhang Xu
;
Jianhang Xu
(Formal analysis, Writing – review & editing)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
Search for other works by this author on:
Yosuke Kanai
Yosuke Kanai
a)
(Conceptualization, Formal analysis, Methodology, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
2
Department of Physics and Astronomy, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
a)Author to whom correspondence should be addressed: [email protected]
Search for other works by this author on:
Nicholas J. Boyer
1
Christopher Shepard
1
Ruiyi Zhou
1
Jianhang Xu
1
Yosuke Kanai
1,2,a)
1
Department of Chemistry, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
2
Department of Physics and Astronomy, University of North Carolina at Chapel Hill
, Chapel Hill, North Carolina 27599, USA
a)Author to whom correspondence should be addressed: [email protected]
J. Chem. Phys. 160, 064113 (2024)
Article history
Received:
September 01 2023
Accepted:
January 07 2024
Citation
Nicholas J. Boyer, Christopher Shepard, Ruiyi Zhou, Jianhang Xu, Yosuke Kanai; Theory of moment propagation for quantum dynamics in single-particle description. J. Chem. Phys. 14 February 2024; 160 (6): 064113. https://doi.org/10.1063/5.0174669
Download citation file:
Pay-Per-View Access
$40.00
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Citing articles via
The Amsterdam Modeling Suite
Evert Jan Baerends, Nestor F. Aguirre, et al.
DeePMD-kit v2: A software package for deep potential models
Jinzhe Zeng, Duo Zhang, et al.
CREST—A program for the exploration of low-energy molecular chemical space
Philipp Pracht, Stefan Grimme, et al.
Related Content
A short trajectory is all you need: A transformer-based model for long-time dissipative quantum dynamics
J. Chem. Phys. (November 2024)
Time-dependent density functional theory with the orthogonal projector augmented wave method
J. Chem. Phys. (April 2024)
Machine-learned correction to ensemble-averaged wave packet dynamics
J. Chem. Phys. (September 2023)
Data-driven characterization of latent dynamics on quantum testbeds
AVS Quantum Sci. (July 2024)
Lagrangian formulation of nuclear–electronic orbital Ehrenfest dynamics with real-time TDDFT for extended periodic systems
J. Chem. Phys. (November 2024)