DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Excited-State Diffusion Monte Carlo Calculations: A Simple and Efficient Two-Determinant Ansatz

Journal Article · · Journal of Chemical Theory and Computation
ORCiD logo [1]; ORCiD logo [2]
  1. Univ. Chemical Lab, Cambridge (United Kingdom)
  2. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

We perform excited-state variational Monte Carlo and diffusion Monte Carlo calculations using a simple and efficient wave function ansatz. This ansatz follows the recent variation-after-response formalism, accurately approximating a configuration interaction singles wave function as a sum of only two nonorthogonal Slater determinants and further including important orbital relaxation. The ansatz is used to perform diffusion Monte Carlo calculations with large augmented basis sets, comparing to benchmarks from near-exact quantum chemical methods. Here, the significance of orbital optimization in excited-state diffusion Monte Carlo is demonstrated, and the excited-state optimization procedure is discussed in detail. Diffuse excited states in water and formaldehyde are studied, in addition to the formaldimine and benzonitrile molecules.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1543632
Journal Information:
Journal of Chemical Theory and Computation, Journal Name: Journal of Chemical Theory and Computation Journal Issue: 1 Vol. 15; ISSN 1549-9618
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (64)

General atomic and molecular electronic structure system journal November 1993
P y SCF: the Python-based simulations of chemistry framework : The PySCF program
  • Sun, Qiming; Berkelbach, Timothy C.; Blunt, Nick S.
  • Wiley Interdisciplinary Reviews: Computational Molecular Science, Vol. 8, Issue 1 https://doi.org/10.1002/wcms.1340
journal September 2017
Multiconfiguration second-order perturbation theory approach to strong electron correlation in chemistry and photochemistry: Multiconfiguration second-order perturbation theory
  • Roca-Sanjuán, Daniel; Aquilante, Francesco; Lindh, Roland
  • Wiley Interdisciplinary Reviews: Computational Molecular Science, Vol. 2, Issue 4 https://doi.org/10.1002/wcms.97
journal November 2011
Individualized configuration selection in CI calculations with subsequent energy extrapolation journal August 1974
Electric properties of the low-lying excited states of benzonitrile: geometry relaxation and solvent effects journal May 2015
Convergence of an improved CIPSI algorithm journal February 1983
An extension of the coupled cluster formalism to excited states (I) journal January 1981
Water VUV electronic state spectroscopy by synchrotron radiation journal November 2005
Heat-Bath Configuration Interaction: An Efficient Selected Configuration Interaction Algorithm Inspired by Heat-Bath Sampling journal August 2016
An Efficient Variational Principle for the Direct Optimization of Excited States journal July 2016
Semistochastic Heat-Bath Configuration Interaction Method: Selected Configuration Interaction with Semistochastic Perturbation Theory journal March 2017
Suppressing Ionic Terms with Number-Counting Jastrow Factors in Real Space journal April 2017
Optimizing the Energy with Quantum Monte Carlo: A Lower Numerical Scaling for Jastrow–Slater Expansions journal October 2017
Size Consistent Excited States via Algorithmic Transformations between Variational Principles journal November 2017
Deterministic Construction of Nodal Surfaces within Quantum Monte Carlo: The Case of FeS journal January 2018
A Mountaineering Strategy to Excited States: Highly Accurate Reference Energies and Benchmarks journal June 2018
Intramolecular Charge-Transfer Excited-State Processes in 4-( N , N -Dimethylamino)benzonitrile: The Role of Twisting and the πσ* State journal May 2015
Excited States of Methylene, Polyenes, and Ozone from Heat-Bath Configuration Interaction journal February 2018
Multiconfiguration Self-Consistent Field and Multireference Configuration Interaction Methods and Applications journal December 2011
Structural Changes Accompanying Intramolecular Electron Transfer:  Focus on Twisted Intramolecular Charge-Transfer States and Structures journal October 2003
Absorption Spectrum of the Green Fluorescent Protein Chromophore: A Difficult Case for ab Initio Methods? journal July 2009
Long-range charge-transfer excited states in time-dependent density functional theory require non-local exchange journal August 2003
Iterative perturbation calculations of ground and excited state energies from multiconfigurational zeroth‐order wavefunctions journal June 1973
Optimized Jastrow–Slater wave functions for ground and excited states: Application to the lowest states of ethene journal June 2004
Excitations in photoactive molecules from quantum Monte Carlo journal September 2004
Correlated geminal wave function for molecules: An efficient resonating valence bond approach journal October 2004
Energy-consistent pseudopotentials for quantum Monte Carlo calculations journal June 2007
Excited states of the water molecule: Analysis of the valence and Rydberg character journal March 2008
Fermion Monte Carlo without fixed nodes: A game of life, death, and annihilation in Slater determinant space journal January 2009
Resonating valence bond wave function with molecular orbitals: Application to first-row molecules journal October 2009
Communications: Survival of the fittest: Accelerating convergence in full configuration-interaction quantum Monte Carlo journal January 2010
Communication: Configuration interaction singles has a large systematic bias against charge-transfer states journal August 2011
Computing the energy of a water molecule using multideterminants: A simple, efficient algorithm journal December 2011
Electron‐impact excitation of H 2 O and D 2 O at various scattering angles and impact energies in the energy‐loss range 4.2–12 eV journal July 1975
A random‐walk simulation of the Schrödinger equation: H + 3 journal August 1975
Molecular Rydberg states. VII. Water journal January 1977
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Electron affinities of the first‐row atoms revisited. Systematic basis sets and wave functions journal May 1992
The equation of motion coupled‐cluster method. A systematic biorthogonal approach to molecular excitation energies, transition probabilities, and excited state properties journal May 1993
A diffusion Monte Carlo algorithm with very small time‐step errors journal August 1993
Communication: Adjusting charge transfer state energies for configuration interaction singles: Without any parameterization and with minimal cost journal April 2012
Accuracy of electronic wave functions in quantum Monte Carlo: The effect of high-order correlations journal August 1997
Benzonitrile: Electron affinity, excited states, and anion solvation journal October 2015
Simple formalism for efficient derivatives and multi-determinant expansions in quantum Monte Carlo journal May 2016
Communication: Variation after response in quantum Monte Carlo journal August 2016
Charge-transfer excited states: Seeking a balanced and efficient wave function ansatz in variational Monte Carlo journal November 2017
Delayed Slater determinant update algorithms for high efficiency quantum Monte Carlo journal November 2017
Fate of the open-shell singlet ground state in the experimentally accessible acenes: A quantum Monte Carlo study journal April 2018
Communication: An efficient and accurate perturbative correction to initiator full configuration interaction quantum Monte Carlo journal June 2018
Excitation energies from diffusion Monte Carlo using selected configuration interaction nodes journal July 2018
Communication: A mean field platform for excited state quantum chemistry journal August 2018
QMCPACK : an open source ab initio quantum Monte Carlo package for the electronic structure of atoms, molecules and solids journal April 2018
Diffusion quantum Monte Carlo calculations of the excited states of silicon journal May 1998
Generalized Lanczos algorithm for variational quantum Monte Carlo journal June 2001
Beyond the locality approximation in the standard diffusion Monte Carlo method journal October 2006
Nonlinear biases, stochastically sampled effective Hamiltonians, and spectral functions in quantum Monte Carlo methods journal August 2018
Projector Quantum Monte Carlo Method for Nonlinear Wave Functions journal April 2017
Density-Functional Theory for Time-Dependent Systems journal March 1984
Optimized trial wave functions for quantum Monte Carlo calculations journal April 1988
Energy and Variance Optimization of Many-Body Wave Functions journal April 2005
Alleviation of the Fermion-Sign Problem by Optimization of Many-Body Wave Functions journal March 2007
Quantum Monte Carlo simulations of solids journal January 2001
Using perturbatively selected configuration interaction in quantum Monte Carlo calculations journal September 2013
Equation-of-Motion Coupled-Cluster Methods for Open-Shell and Electronically Excited Species: The Hitchhiker's Guide to Fock Space journal May 2008

Cited By (6)

Excited states with selected CI-QMC: chemically accurate excitation energies and geometries text January 2019
Complementary first and second derivative methods for ansatz optimization in variational Monte Carlo journal January 2019
Singlet–triplet gaps in diradicals obtained with diffusion quantum Monte Carlo using a Slater–Jastrow trial wavefunction with a minimum number of determinants journal January 2019
Diffusion quantum Monte Carlo calculations with a recent generation of effective core potentials for ionization potentials and electron affinities journal December 2019
Variational Excitations in Real Solids: Optical Gaps and Insights into Many-Body Perturbation Theory journal July 2019
Structural, electronic, and magnetic properties of bulk and epitaxial LaCoO 3 through diffusion Monte Carlo journal December 2019