Finite-temperature many-body perturbation theory for anharmonic vibrations: Recursions, algebraic reduction, second-quantized reduction, diagrammatic rules, linked-diagram theorem, finite-temperature self-consistent field, and general-order algorithm
Abstract
A unified theory is presented for finite-temperature many-body perturbation expansions of the anharmonic vibrational contributions to thermodynamic functions, i.e., the free energy, internal energy, and entropy. The theory is diagrammatically size-consistent at any order, as ensured by the linked-diagram theorem proved in this study, and thus applicable to molecular gases and solids on an equal footing. It is also a basis-set-free formalism, just like its underlying Bose-Einstein theory, capable of summing anharmonic effects over an infinite number of states analytically. It is formulated by the Rayleigh-Schrödinger-style recursions, generating sum-over-states formulas for the perturbation series, which unambiguously converges at the finite-temperature vibrational full-configuration-interaction limits. Two strategies are introduced to reducing these sum-over-states formulas into compact sum-over-modes analytical formulas. One is a purely algebraic method that factorizes each many-mode thermal average into a product of one-mode thermal averages, which are then evaluated by the thermal Born-Huang rules. Canonical forms of these rules are proposed, dramatically expediting the reduction process. The other is finite-temperature normal-ordered second quantization, which is fully developed in this study, including a proof of thermal Wick's theorem and the derivation of a normal-ordered vibrational Hamiltonian at finite temperature. The latter naturally defines a finite-temperature extension of size-extensive vibrational self-consistentmore »
- Authors:
-
- University of Illinois at Urbana-Champaign
- Publication Date:
- Research Org.:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
- OSTI Identifier:
- 1993171
- Grant/Contract Number:
- SC0006028
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Journal of Chemical Physics
- Additional Journal Information:
- Journal Volume: 159; Journal Issue: 8; Journal ID: ISSN 0021--9606
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Anharmonic vibrations; perturbation theory; thermodynamics; Feynman diagrams; quantum field theory
Citation Formats
Qin, Xiuyi, and Hirata, So. Finite-temperature many-body perturbation theory for anharmonic vibrations: Recursions, algebraic reduction, second-quantized reduction, diagrammatic rules, linked-diagram theorem, finite-temperature self-consistent field, and general-order algorithm. United States: N. p., 2023.
Web. doi:10.1063/5.0164326.
Qin, Xiuyi, & Hirata, So. Finite-temperature many-body perturbation theory for anharmonic vibrations: Recursions, algebraic reduction, second-quantized reduction, diagrammatic rules, linked-diagram theorem, finite-temperature self-consistent field, and general-order algorithm. United States. https://doi.org/10.1063/5.0164326
Qin, Xiuyi, and Hirata, So. Sun .
"Finite-temperature many-body perturbation theory for anharmonic vibrations: Recursions, algebraic reduction, second-quantized reduction, diagrammatic rules, linked-diagram theorem, finite-temperature self-consistent field, and general-order algorithm". United States. https://doi.org/10.1063/5.0164326. https://www.osti.gov/servlets/purl/1993171.
@article{osti_1993171,
title = {Finite-temperature many-body perturbation theory for anharmonic vibrations: Recursions, algebraic reduction, second-quantized reduction, diagrammatic rules, linked-diagram theorem, finite-temperature self-consistent field, and general-order algorithm},
author = {Qin, Xiuyi and Hirata, So},
abstractNote = {A unified theory is presented for finite-temperature many-body perturbation expansions of the anharmonic vibrational contributions to thermodynamic functions, i.e., the free energy, internal energy, and entropy. The theory is diagrammatically size-consistent at any order, as ensured by the linked-diagram theorem proved in this study, and thus applicable to molecular gases and solids on an equal footing. It is also a basis-set-free formalism, just like its underlying Bose-Einstein theory, capable of summing anharmonic effects over an infinite number of states analytically. It is formulated by the Rayleigh-Schrödinger-style recursions, generating sum-over-states formulas for the perturbation series, which unambiguously converges at the finite-temperature vibrational full-configuration-interaction limits. Two strategies are introduced to reducing these sum-over-states formulas into compact sum-over-modes analytical formulas. One is a purely algebraic method that factorizes each many-mode thermal average into a product of one-mode thermal averages, which are then evaluated by the thermal Born-Huang rules. Canonical forms of these rules are proposed, dramatically expediting the reduction process. The other is finite-temperature normal-ordered second quantization, which is fully developed in this study, including a proof of thermal Wick's theorem and the derivation of a normal-ordered vibrational Hamiltonian at finite temperature. The latter naturally defines a finite-temperature extension of size-extensive vibrational self-consistent field theory. These reduced formulas can be represented graphically as Feynman diagrams with resolvent lines, which include anomalous and renormalization diagrams. Two order-by-order and one general-order algorithms of computing these perturbation corrections are implemented and applied up to the eighth order. The results show no signs of Kohn-Luttinger-type nonconvergence.},
doi = {10.1063/5.0164326},
journal = {The Journal of Chemical Physics},
number = 8,
volume = 159,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2023},
month = {Sun Jan 01 00:00:00 EST 2023}
}
Works referenced in this record:
Second-order many-body perturbation study of ice Ih
journal, November 2012
- He, Xiao; Sode, Olaseni; Xantheas, Sotiris S.
- The Journal of Chemical Physics, Vol. 137, Issue 20
Second-Order Many-Body Perturbation Study on Thermal Expansion of Solid Carbon Dioxide
journal, December 2014
- Li, Jinjin; Sode, Olaseni; Hirata, So
- Journal of Chemical Theory and Computation, Vol. 11, Issue 1
Ice Ih anomalies: Thermal contraction, anomalous volume isotope effect, and pressure-induced amorphization
journal, May 2016
- Salim, Michael A.; Willow, Soohaeng Yoo; Hirata, So
- The Journal of Chemical Physics, Vol. 144, Issue 20
Role of Low-Energy Phonons in Thermal Conduction
journal, August 1954
- Herring, Conyers
- Physical Review, Vol. 95, Issue 4
Theory of Thermal Conductivity of Anharmonic Crystals
journal, May 1973
- Wilson, Robert S.; Kim, Shoon K.
- Physical Review B, Vol. 7, Issue 10
Theory of thermal conductivity of anharmonic crystals: Nondiagonal Peierls contribution
journal, November 1974
- Knauss, Donald C.; Wilson, Robert S.
- Physical Review B, Vol. 10, Issue 10
Temperature pulses in dielectric solids
journal, October 1968
- Ackerman, C. C.; Guyer, R. A.
- Annals of Physics, Vol. 50, Issue 1
Helmholtz Free Energy of an Anharmonic Crystal toO ( λ 4 )
journal, June 1971
- Shukla, R. C.; Cowley, E. R.
- Physical Review B, Vol. 3, Issue 12
Fermi resonance in solid CO 2 under pressure
journal, February 2013
- Sode, Olaseni; Keçeli, Murat; Yagi, Kiyoshi
- The Journal of Chemical Physics, Vol. 138, Issue 7
Response to “Comment on ‘Fermi resonance in solid CO 2 under pressure’” [J. Chem. Phys. 140, 177101 (2014)]
journal, May 2014
- Hirata, So; Sode, Olaseni; Keçeli, Murat
- The Journal of Chemical Physics, Vol. 140, Issue 17
Anharmonic Phonon Dispersion in Polyethylene
journal, November 2020
- Qin, Xiuyi; Hirata, So
- The Journal of Physical Chemistry B, Vol. 124, Issue 46
Thermodynamic limit and size-consistent design
journal, June 2011
- Hirata, So
- Theoretical Chemistry Accounts, Vol. 129, Issue 6
Extensivity of Energy and Electronic and Vibrational Structure Methods for Crystals
journal, May 2012
- Hirata, So; Keçeli, Murat; Ohnishi, Yu-ya
- Annual Review of Physical Chemistry, Vol. 63, Issue 1
On the mutual exclusion of variationality and size consistency
journal, January 2014
- Hirata, So; Grabowski, Ireneusz
- Theoretical Chemistry Accounts, Vol. 133, Issue 3
The use of a model in anharmonic lattice dynamics
journal, January 1958
- Hooton, D. J.
- Philosophical Magazine, Vol. 3, Issue 25
Theory of the Self-Consistent Harmonic Approximation with Application to Solid Neon
journal, July 1966
- Koehler, Thomas R.
- Physical Review Letters, Vol. 17, Issue 2
Properties of Crystalline Argon and Neon in the Self-Consistent Phonon Approximation
journal, January 1968
- Gillis, N. S.; Werthamer, N. R.; Koehler, T. R.
- Physical Review, Vol. 165, Issue 3
First-Order Dyson Coordinates and Geometry
journal, May 2013
- Hermes, Matthew R.; Hirata, So
- The Journal of Physical Chemistry A, Vol. 117, Issue 32
Helmholtz free energy of an anharmonic crystal toO ( λ 4 ) . II
journal, October 1974
- Shukla, R. C.; Wilk, L.
- Physical Review B, Vol. 10, Issue 8
Anharmonic contributions to vibrational thermodynamic properties of solids
journal, September 1961
- Maradudin, A. A.; Flinn, P. A.; Coldwell-Horsfall, R. A.
- Annals of Physics, Vol. 15, Issue 3
Anharmonic contributions to vibrational thermodynamic properties of solids
journal, September 1961
- Maradudin, A. A.; Flinn, P. A.; Coldwell-Horsfall, R. A.
- Annals of Physics, Vol. 15, Issue 3
Anharmonic contributions to vibrational thermodynamic properties of solids
journal, May 1963
- Flinn, P. A.; Maradudin, A. A.
- Annals of Physics, Vol. 22, Issue 2
The lattice dynamics of an anharmonic crystal
journal, October 1963
- Cowley, R. A.
- Advances in Physics, Vol. 12, Issue 48
Anharmonic crystals
journal, January 1968
- Cowley, R. A.
- Reports on Progress in Physics, Vol. 31, Issue 1
Helmholtz free energy of an anharmonic crystal to O(λ 4 ). III. Equation of state for the Lennard-Jones solid
journal, January 1985
- Shukla, R. C.; Cowley, E. R.
- Physical Review B, Vol. 31, Issue 1
Helmholtz free energy of an anharmonic crystal to O(λ 4 ). IV. Thermodynamic properties of Kr and Xe for the Lennard-Jones, Morse, and Rydberg potentials
journal, August 1985
- Shukla, R. C.; Shanes, F.
- Physical Review B, Vol. 32, Issue 4
Anharmonic lattice vibrations in solid N2
journal, July 1978
- Kobashi, Koji
- Molecular Physics, Vol. 36, Issue 1
Anharmonic lattice vibrations in solid N2
journal, December 1978
- Kobashi, K.; Chandrasekharan, V.
- Molecular Physics, Vol. 36, Issue 6
Un développement du potentiel de gibbs d'un système quantique composé d'un grand nombre de particules
journal, June 1958
- Bloch, Claude; De Dominicis, Cyrano
- Nuclear Physics, Vol. 7
Ground-State Energy of a Many-Fermion System
journal, April 1960
- Kohn, W.; Luttinger, J. M.
- Physical Review, Vol. 118, Issue 1
Ground-State Energy of a Many-Fermion System. II
journal, June 1960
- Luttinger, J. M.; Ward, J. C.
- Physical Review, Vol. 118, Issue 5
Formulation de la me´canique statistique en termes de nombres d'occupation (I)
journal, May 1961
- Balian, Roger; Bloch, Claude; De Dominicis, Cyrano
- Nuclear Physics, Vol. 25
A New Approach to Quantum-Statistical Mechanics
journal, October 1955
- Matsubara, Takeo
- Progress of Theoretical Physics, Vol. 14, Issue 4
Finite-temperature many-body perturbation theory for electrons: Algebraic recursive definitions, second-quantized derivation, linked-diagram theorem, general-order algorithms, and grand canonical and canonical ensembles
journal, September 2021
- Hirata, So
- The Journal of Chemical Physics, Vol. 155, Issue 9
General Perturbative Approach for Spectroscopy, Thermodynamics, and Kinetics: Methodological Background and Benchmark Studies
journal, February 2012
- Bloino, Julien; Biczysko, Malgorzata; Barone, Vincenzo
- Journal of Chemical Theory and Computation, Vol. 8, Issue 3
HEAT: High accuracy extrapolated ab initio thermochemistry
journal, December 2004
- Tajti, Attila; Szalay, Péter G.; Császár, Attila G.
- The Journal of Chemical Physics, Vol. 121, Issue 23
Predictive electronic and vibrational many-body methods for molecules and macromolecules
journal, October 2008
- Hirata, So; Yagi, Kiyoshi
- Chemical Physics Letters, Vol. 464, Issue 4-6
Quantitative quantum chemistry
journal, August 2008
- Helgaker, Trygve; Klopper, Wim; Tew, David P.
- Molecular Physics, Vol. 106, Issue 16-18
Fermi resonance in CO2: A combined electronic coupled-cluster and vibrational configuration-interaction prediction
journal, March 2007
- Rodriguez-Garcia, Valerie; Hirata, So; Yagi, Kiyoshi
- The Journal of Chemical Physics, Vol. 126, Issue 12
Anharmonic vibrational properties of CH 2 F 2 : A comparison of theory and experiment
journal, December 1991
- Amos, R. D.; Handy, N. C.; Green, W. H.
- The Journal of Chemical Physics, Vol. 95, Issue 11
The anharmonic force field of ethylene, C 2 H 4 , by means of accurate ab initio calculations
journal, August 1995
- Martin, Jan M. L.; Lee, Timothy J.; Taylor, Peter R.
- The Journal of Chemical Physics, Vol. 103, Issue 7
General method for removing resonance singularities in quantum mechanical perturbation theory
journal, March 1996
- Kuhler, Kathleen M.; Truhlar, Donald G.; Isaacson, Alan D.
- The Journal of Chemical Physics, Vol. 104, Issue 12
Anharmonicity in the ring stretching modes of diborane
journal, June 1998
- Stanton, John F.; Gauss, Jürgen
- The Journal of Chemical Physics, Vol. 108, Issue 22
An efficient approach for calculating vibrational wave functions and zero-point vibrational corrections to molecular properties of polyatomic molecules
journal, February 2000
- Ruud, Kenneth; Åstrand, Per-Olof; Taylor, Peter R.
- The Journal of Chemical Physics, Vol. 112, Issue 6
Vibrational zero-point energies and thermodynamic functions beyond the harmonic approximation
journal, February 2004
- Barone, Vincenzo
- The Journal of Chemical Physics, Vol. 120, Issue 7
Anharmonic vibrational properties by a fully automated second-order perturbative approach
journal, January 2005
- Barone, Vincenzo
- The Journal of Chemical Physics, Vol. 122, Issue 1
Simple(r) algebraic equation for transition moments of fundamental transitions in vibrational second-order perturbation theory
journal, February 2006
- VÁZquez, Juana; Stanton, John F.
- Molecular Physics, Vol. 104, Issue 3
Treatment of Fermi resonance effects on transition moments in vibrational perturbation theory
journal, January 2007
- Vázquez, Juana; Stanton, John F.
- Molecular Physics, Vol. 105, Issue 1
A fully automated implementation of VPT2 Infrared intensities
journal, August 2010
- Barone, Vincenzo; Bloino, Julien; Guido, Ciro A.
- Chemical Physics Letters, Vol. 496, Issue 1-3
Simple perturbation theory estimates of equilibrium constants from force fields
journal, January 1991
- Truhlar, Donald G.; Isaacson, Alan D.
- The Journal of Chemical Physics, Vol. 94, Issue 1
Coherent state semiclassical initial value representation for the Boltzmann operator in thermal correlation functions
journal, June 2002
- Makri, Nancy; Miller, William H.
- The Journal of Chemical Physics, Vol. 116, Issue 21
The self-consistent-field approach to polyatomic vibrations
journal, June 1986
- Bowman, Joel M.
- Accounts of Chemical Research, Vol. 19, Issue 7
Self‐consistent field energies and wavefunctions for coupled oscillators
journal, January 1978
- Bowman, Joel M.
- The Journal of Chemical Physics, Vol. 68, Issue 2
Excited vibrational states of polyatomic molecules: the semiclassical self-consistent field approach
journal, January 1986
- Ratner, Mark A.; Gerber, R. B.
- The Journal of Physical Chemistry, Vol. 90, Issue 1
Investigations of self-consistent field, scf ci and virtual stateconfiguration interaction vibrational energies for a model three-mode system
journal, January 1982
- Christoffel, Kurt M.; Bowman, Joel M.
- Chemical Physics Letters, Vol. 85, Issue 2
Mo/ller–Plesset perturbation theory applied to vibrational problems
journal, December 1996
- Norris, Lawrence S.; Ratner, Mark A.; Roitberg, Adrian E.
- The Journal of Chemical Physics, Vol. 105, Issue 24
Vibrational coupled cluster theory
journal, February 2004
- Christiansen, Ove
- The Journal of Chemical Physics, Vol. 120, Issue 5
Exploring the effect of anharmonicity of molecular vibrations on thermodynamic properties
journal, December 2006
- Njegic, Bosiljka; Gordon, Mark S.
- The Journal of Chemical Physics, Vol. 125, Issue 22
A virtual vibrational self-consistent-field method for efficient calculation of molecular vibrational partition functions and thermal effects on molecular properties
journal, May 2008
- Hansen, Mikkel Bo; Christiansen, Ove; Toffoli, Daniele
- The Journal of Chemical Physics, Vol. 128, Issue 17
A thermal self-consistent field theory for the calculation of molecular vibrational partition functions
journal, September 2009
- Roy, Tapta Kanchan; Prasad, M. Durga
- The Journal of Chemical Physics, Vol. 131, Issue 11
Finite-temperature vibrational full configuration interaction
journal, July 2021
- Qin, Xiuyi; Hirata, So
- Molecular Physics, Vol. 119, Issue 21-22
First-principles theories for anharmonic lattice vibrations
journal, July 2010
- Hirata, So; Keçeli, Murat; Yagi, Kiyoshi
- The Journal of Chemical Physics, Vol. 133, Issue 3
Size-extensive vibrational self-consistent field method
journal, October 2011
- Keçeli, Murat; Hirata, So
- The Journal of Chemical Physics, Vol. 135, Issue 13
Anharmonic vibrational frequencies and vibrationally-averaged structures of key species in hydrocarbon combustion: HCO + , HCO, HNO, HOO, HOO – , CH 3 + , and CH 3
journal, April 2009
- Keçeli, Murat; Shiozaki, Toru; Yagi, Kiyoshi
- Molecular Physics, Vol. 107, Issue 8-12
The Linear Response Approximation and Its Lowest Order Corrections: An Influence Functional Approach
journal, April 1999
- Makri, Nancy
- The Journal of Physical Chemistry B, Vol. 103, Issue 15
Size-extensive vibrational self-consistent field methods with anharmonic geometry corrections
journal, June 2012
- Hermes, Matthew R.; Keçeli, Murat; Hirata, So
- The Journal of Chemical Physics, Vol. 136, Issue 23
Second-order many-body perturbation expansions of vibrational Dyson self-energies
journal, July 2013
- Hermes, Matthew R.; Hirata, So
- The Journal of Chemical Physics, Vol. 139, Issue 3
Higher-order diagrammatic vibrational coupled-cluster theory
journal, October 2015
- Faucheaux, Jacob A.; Hirata, So
- The Journal of Chemical Physics, Vol. 143, Issue 13
Similarity-transformed equation-of-motion vibrational coupled-cluster theory
journal, February 2018
- Faucheaux, Jacob A.; Nooijen, Marcel; Hirata, So
- The Journal of Chemical Physics, Vol. 148, Issue 5
Modeling physical systems by effective harmonic oscillators: The optimized quadratic approximation
journal, February 1995
- Cao, Jianshu; Voth, Gregory A.
- The Journal of Chemical Physics, Vol. 102, Issue 8
Time‐dependent coupled cluster method: A new approach to the calculation of molecular absorption spectra
journal, June 1988
- Prasad, M. Durga
- The Journal of Chemical Physics, Vol. 88, Issue 11
Coupled cluster description of anharmonic molecular vibrations. Application to O3 and SO2
journal, January 1994
- Nagalakshmi, V.; Lakshminarayana, V.; Sumithra, G.
- Chemical Physics Letters, Vol. 217, Issue 3
Calculation of vibrational energy of molecule using coupled cluster linear response theory in bosonic representation: Convergence studies
journal, October 2008
- Banik, Subrata; Pal, Sourav; Prasad, M. Durga
- The Journal of Chemical Physics, Vol. 129, Issue 13
Diagrammatic theories of anharmonic molecular vibrations
journal, December 2014
- Hermes, Matthew R.; Hirata, So
- International Reviews in Physical Chemistry, Vol. 34, Issue 1
Normal-ordered second-quantized Hamiltonian for molecular vibrations
journal, November 2014
- Hirata, So; Hermes, Matthew R.
- The Journal of Chemical Physics, Vol. 141, Issue 18
Finite-temperature many-body perturbation theory in the canonical ensemble
journal, February 2020
- Jha, Punit K.; Hirata, So
- Physical Review E, Vol. 101, Issue 2
Finite-temperature many-body perturbation theory in the grand canonical ensemble
journal, July 2020
- Hirata, So; Jha, Punit K.
- The Journal of Chemical Physics, Vol. 153, Issue 1
Degenerate RS perturbation theory
journal, February 1974
- Hirschfelder, Joseph O.; Certain, Phillip R.
- The Journal of Chemical Physics, Vol. 60, Issue 3
Normal ordered exponential approach to thermal properties and time-correlation functions: general theory and simple examples
journal, October 2021
- Nooijen, Marcel; Bao, Songhao
- Molecular Physics, Vol. 119, Issue 21-22
One-particle many-body Green’s function theory: Algebraic recursive definitions, linked-diagram theorem, irreducible-diagram theorem, and general-order algorithms
journal, July 2017
- Hirata, So; Doran, Alexander E.; Knowles, Peter J.
- The Journal of Chemical Physics, Vol. 147, Issue 4
Low-temperature breakdown of many-body perturbation theory for thermodynamics
journal, January 2021
- Hirata, So
- Physical Review A, Vol. 103, Issue 1
General solution to the Kohn–Luttinger nonconvergence problem
journal, August 2022
- Hirata, So
- Chemical Physics Letters, Vol. 800
Ab initio vibrational state calculations with a quartic force field: Applications to H2CO, C2H4, CH3OH, CH3CCH, and C6H6
journal, July 2004
- Yagi, Kiyoshi; Hirao, Kimihiko; Taketsugu, Tetsuya
- The Journal of Chemical Physics, Vol. 121, Issue 3
Multiresolution potential energy surfaces for vibrational state calculations
journal, July 2007
- Yagi, Kiyoshi; Hirata, So; Hirao, Kimihiko
- Theoretical Chemistry Accounts, Vol. 118, Issue 3
Bound States in Quantum Field Theory
journal, October 1951
- Gell-Mann, Murray; Low, Francis
- Physical Review, Vol. 84, Issue 2
Many-Body Problem for Strongly Interacting Particles. II. Linked Cluster Expansion
journal, October 1955
- Brueckner, K. A.
- Physical Review, Vol. 100, Issue 1
Perturbation theory of large quantum systems
journal, January 1957
- Hugenholtz, N. M.
- Physica, Vol. 23, Issue 1-5
Many-body basis for the optical model
journal, February 1960
- Frantz, Lee M.; Mills, Robert L.
- Nuclear Physics, Vol. 15
The linked-diagram expansion of the ground state of a many-electron system: A time-independent derivation
journal, January 1977
- Manne, Rolf
- International Journal of Quantum Chemistry, Vol. 12, Issue S11
Stability of the thermal Hartree-Fock approximation
journal, January 1963
- Mermin, N. David
- Annals of Physics, Vol. 21, Issue 1
Koopmans' theorem in the statistical Hartree–Fock theory
journal, June 2011
- Pain, Jean-Christophe
- Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 44, Issue 14
Dyson-orbital concepts for description of electrons in molecules
journal, August 2020
- Ortiz, J. V.
- The Journal of Chemical Physics, Vol. 153, Issue 7
The calculation of higher-order energies in the many-body perturbation theory series
journal, January 1985
- Knowles, P. J.; Somasundram, K.; Handy, N. C.
- Chemical Physics Letters, Vol. 113, Issue 1
Surprising cases of divergent behavior in Mo/ller–Plesset perturbation theory
journal, September 1996
- Olsen, Jeppe; Christiansen, Ove; Koch, Henrik
- The Journal of Chemical Physics, Vol. 105, Issue 12
High-order coupled-cluster calculations through connected octuple excitations
journal, April 2000
- Hirata, So; Bartlett, Rodney J.
- Chemical Physics Letters, Vol. 321, Issue 3-4