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Method for approximating many-body systems
Coupled cluster (CC) is a numerical technique used for describing many-body systems. Its most common use is as one of several post-Hartree–Fock ab initio
Coupled_cluster
State-universal coupled cluster (SUCC) method is one of several multi-reference coupled-cluster (MR) generalizations of single-reference coupled cluster method
State-universal coupled cluster
State-universal_coupled_cluster
Set of computers configured in a distributed computing system
file systems with file-level locking. The first commercial loosely coupled cluster computer with integrated system-wide manageability and record-level
Computer_cluster
High-temperature expansion in statistical mechanics
introduced the basis for the coupled-cluster approach that mainly operates with many-body wavefunctions. The coupled-clusters approach is one of the most
Cluster_expansion
Indian theoretical chemist
strongly coupled correlated systems have shown promise of the method. A useful spin-off of the method is the combined use of time-dependent coupled cluster method
Debashis_Mukherjee
Polish-born American physical chemist
for molecular systems and atomic nuclei, including methods based on coupled cluster theory, mathematical methods of chemistry and physics, and theory of
Piotr_Piecuch
Set of methods in computational chemistry
though at greater computational cost. Configuration interaction (CI) Coupled cluster (CC) Møller–Plesset perturbation theory (MP2, MP3, MP4, etc.) Quadratic
Post–Hartree–Fock
Indian Theoretical Chemist
multi-reference coupled cluster theory, as well as extended coupled-cluster functions. He has developed a non-iterative approximation to coupled-perturbed Kohn-Sham
Sourav_Pal
Computational quantum mechanical modelling method to investigate electronic structure
traditional wavefunction-based methods like configuration interaction or coupled cluster theory). In the current DFT approach it is not possible to estimate
Density_functional_theory
Czech chemist (1938–2024)
professor at University of Waterloo in Canada. In 1966 he reformulated the coupled cluster method (originally developed in the 1950s for nuclear physics) for
Jiří_Čížek
Combining multiple simulation methods
B3LYP and sometimes the QCISD(T) method in step 2 is replaced by the coupled cluster method CCSD(T). The G2(+) variant, where the "+" symbol refers to added
Quantum chemistry composite methods
Quantum_chemistry_composite_methods
Interaction between electrons, often complicating physical calculations
correlation energy partitioning has also been shown to be possible with coupled cluster methods. multi-configurational self-consistent field (MCSCF) There
Electronic_correlation
Quantum chemistry software
semi-empirical, density functional theory, many-body perturbation, coupled cluster, and multireference methods. ORCA provides an easy-to-learn input structure
ORCA (quantum chemistry program)
ORCA_(quantum_chemistry_program)
Category of computational quantum chemistry technique
scales as N6. To fourth order (MP4) MP scales as N7. Another method, coupled cluster with singles and doubles (CCSD), scales as N6 and extensions, CCSD(T)
Ab initio quantum chemistry methods
Ab_initio_quantum_chemistry_methods
A Cluster diagram or clustering diagram is a general type of diagram, which represents some kind of cluster. A cluster in general is a group or bunch of
Cluster_diagram
Topics referred to by the same term
(space group), three-dimensional space group number 9 in mathematics Coupled cluster, a numerical technique in computational chemistry Chemours (former
CC
Technique in computational quantum field theory
heavy-ion collisions. The light-front coupled cluster (LFCC) method is a particular form of truncation for the infinite coupled system of integral equations for
Light-front computational methods
Light-front_computational_methods
important distinctions to be made between them. Hartree–Fock (HF), coupled cluster, many-body perturbation theory (to any order), and full configuration
Size consistency and size extensivity
Size_consistency_and_size_extensivity
Chemistry based on quantum physics
theory, Hartree–Fock calculations, quantum Monte Carlo methods, and coupled cluster methods. Understanding electronic structure and molecular dynamics
Quantum_chemistry
equation: Green's function Monte Carlo (GFMC) No-core shell model (NCSM) Coupled cluster (CC) Self-consistent Green's function (SCGF) In-medium similarity renormalization
Ab initio methods (nuclear physics)
Ab_initio_methods_(nuclear_physics)
Chemical compound
functionals, DFT+U, the GW approximation, self-interaction corrected DFT, or coupled cluster theory, all recover the band gap with significantly improved accuracy
Manganese(II)_oxide
program for the accurate description of nuclear dynamics with means of Coupled Cluster Theory. Ove Christiansen made important contributions to electronic
Ove_Christiansen
Topics referred to by the same term
Council, former name of GS1 US Unique Country Code Unitary Coupled Cluster, a kind of coupled cluster in computational chemistry Unlock CPU Core, a technology
UCC
Topics referred to by the same term
Succ, SUCC, or S.U.C.C. may refer to: sucC RNA motif State-universal coupled cluster Sydney University Cricket Club A slang term for fellatio, derived from
Succ
series can be accounted for using many-body perturbation theory or coupled-cluster approaches. Alternatively, density functional theory variants of SAPT
Symmetry-adapted perturbation theory
Symmetry-adapted_perturbation_theory
American chemist
for electron correlation, in particular, many-body perturbation and coupled cluster methods, which are today's central computational tool for accurate
Rodney_J._Bartlett
Class of cell surface receptors coupled to G-protein-associated intracellular signaling
protein-coupled receptors are involved in many diseases. There are two principal signal transduction pathways involving the G protein-coupled receptors:
G_protein-coupled_receptor
Initial estimate or framework to the solution of a mathematical problem
Method of undetermined coefficients Bayesian inference Bethe ansatz Coupled cluster Guesstimate Heuristic Hypothesis Trial and error "Definition of ANSATZ"
Ansatz
the group of John Pople. It gives results that are comparable to the coupled cluster method, CCSD. QCISD can be improved by the same perturbative inclusion
Quadratic configuration interaction
Quadratic_configuration_interaction
Use of two or more central processing units (CPUs) within one computer system
Beowulf cluster is an example of a loosely coupled system. Tightly coupled systems perform better and are physically smaller than loosely coupled systems
Multiprocessing
Computational chemistry software package
(TDDFT), Møller–Plesset perturbation theory (MP2), coupled cluster (CC), equation-of-motion coupled-cluster (EOM-CC), configuration interaction (CI), algebraic
Q-Chem
Rules in computational chemistry
theory as a reference such as Møller–Plesset perturbation theory, and Coupled cluster and Configuration interaction theories. In 1929 John C. Slater derived
Slater–Condon_rules
Topics referred to by the same term
Iowa Crook County School District, Oregon Coupled Cluster Singles and Doubles – a method in coupled cluster theory Centre pour la communication scientifique
CCSD
interaction, finite-order Møller–Plesset perturbation theory, and coupled cluster theory.[citation needed] Although fewer N-electron functions are required
Full configuration interaction
Full_configuration_interaction
Ab initio quantum chemistry software package
correlation problem through the multireference configuration interaction, coupled cluster and associated methods. Integral-direct local electron correlation
MOLPRO
Concept in computational chemistry
qualitatively wrong and so are the CI wave functions and energies. Coupled cluster Electron correlation Multireference configuration interaction (MRCI)
Configuration_interaction
M06-2X, M06-HF Head-Gordon group functionals: ωB97, ωB97X, ωB97X-D Coupled cluster methods. CCSD, CCSD(T), CCSD(2), OD, OD(T), OD(2), QCCD, VOD, VOD(2)
Spartan_(chemistry_software)
various molecular properties using the Hartree–Fock, MP2, MCSCF and coupled cluster theories. Version 2.0 of DALTON added support for density functional
Dalton_(program)
Theoretical chemist
such as coupled-cluster and equation-of-motion (or linear response) approaches. She developed the spin-flip approach, which extends coupled-cluster and density
Anna_Krylov
Canadian chemist (1935–2023)
collaborative work with Jiří Čížek on coupled cluster theory. Paldus and Čížek adapted the many-body coupled cluster method to many-electron systems, thus
Josef_Paldus
Method for describing the electronic structure of molecules using quantum mechanics
in a metal. Chemistry portal Cis effect Configuration interaction Coupled cluster Frontier molecular orbital theory Ligand field theory (MO theory for
Molecular_orbital_theory
sophisticated calculations. The "gold standard" computational method are coupled-cluster methods like CCSD(T) that account for the electron correlation origin
Dispersion stabilized molecules
Dispersion_stabilized_molecules
Ab initio quantum chemistry program
Hartree–Fock, MP2, density functional theory, configuration interaction and coupled cluster electronic structure theories. Dirac is one of the most successful
Dirac_(software)
Problem in physics and quantum mechanics
theory and Green's function-based methods Configuration interaction Coupled cluster Various Monte-Carlo approaches Density functional theory Lattice gauge
Many-body_problem
Topics referred to by the same term
Reconnaissance and Command Center, see for example PPRU-1 Multi-Reference Coupled Cluster Multi-Role Combatant Craft, see Wet sub Mumbai Regional Congress Committee
MRCC
(MP2, MP3, MP4), configuration interaction (CISD, CISDT, CISDTQ), and coupled cluster theory (CCSD, CCSDT, CCSDTQ, EOMCCSD, EOMCCSDT, EOMCCSDTQ). The Tensor
NWChem
VAXcluster, is a computer cluster involving a group of computers running the OpenVMS operating system. Whereas tightly coupled multiprocessor systems run
VMScluster
Open-source container software
assembles one or more computers, either virtual machines or bare metal, into a cluster which can run workloads in containers. It works with various container
Kubernetes
Explosive weapon with small submunitions
A cluster munition is a form of air-dropped or ground-launched explosive weapon that releases or ejects smaller submunitions. Cluster munitions are air-dropped
Cluster_munition
wave function methods, especially many-body perturbation theory and coupled cluster theory" 2009 Gernot Frenking "For his outstanding work on computational
Schrödinger_Medal
Computational chemistry software
(CAS) and multi-configurational self-consistent field calculations Coupled cluster calculations Quadratic configuration interaction (QCI) methods Quantum
Gaussian_(software)
Danish chemist (born 1944)
and time-dependent linear and non-linear response function theory coupled cluster perturbation theory calculation of magnetic molecular properties using
Poul_Jørgensen_(chemist)
Quantum state of a system
to relax to equilibrium. Excited states are often calculated using coupled cluster, Møller–Plesset perturbation theory, multi-configurational self-consistent
Excited_state
Approximation method in quantum physics
invoking the variational method, one can derive a set of N {\displaystyle N} coupled equations for the N {\displaystyle N} spin orbitals. A solution of these
Hartree–Fock_method
Methods of mathematical approximation
quantum chemistry programs. A related but more accurate method is the coupled cluster method. Perturbation theory was first devised to solve otherwise intractable
Perturbation_theory
functions to do the Hartree–Fock, MP2, density functional theory, MCSCF, coupled cluster theory at non-relativistic level and 4-component relativistic Hartree–Fock
PySCF
quantum-chemical methods in general. And in particular: Multireference coupled cluster Electron-molecule scattering theory and its applications to high resolution
Petr_Cársky
the computer. To this end a complementary series of tools, rooted in coupled cluster, algebraic diagrammatic construction, density functional theory, as
Computational Spectroscopy In Natural Sciences and Engineering
Computational_Spectroscopy_In_Natural_Sciences_and_Engineering
Star cluster in the constellation of Taurus
as Seven Sisters and Messier 45 (M45), is an asterism of an open star cluster containing young B-type stars in the northwest of the constellation Taurus
Pleiades
Theoretical chemist
configuration interaction calculations; and major contributions to coupled cluster theory. He is one of the founding authors of the COLUMBUS suite of
Isaiah_Shavitt
Computational method in Chemistry
interaction (CI), second order Møller–Plesset perturbation theory (MP2), coupled cluster (CC), and density functional tight binding (DFTB). Excited states can
Fragment_molecular_orbital
Describes the range of energies of an electron within the solid
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Electronic_band_structure
method Density functional theory Møller–Plesset perturbation theory Coupled cluster CASSCF Multireference configuration interaction methods Symmetry-adapted
PSI_(computational_chemistry)
Austrian chemist (1933–2019)
contributions were in the following fields: relativistic quantum chemistry, coupled cluster methods, theoretical calculation of NMR chemical shifts, explicitly
Werner_Kutzelnigg
Molecular structures and ubiquitous inorganic cofactors found in all domains of life
found in all forms of life. The relevant redox couple in all Fe–S proteins is Fe(II)/Fe(III). Many clusters have been synthesized in the laboratory with
Iron–sulfur_cluster
Computational model of molecular forces
Schwartzentruber, T. E. (2013). "Oxygen Interactions with Silica Surfaces: Coupled Cluster and Density Functional Investigation and the Development of a New ReaxFF
ReaxFF
Ion of carbon with five hydrogens
Klopper, Wim (1997). "CH5+: The story goes on. An explicitly correlated coupled-cluster study". Journal of Chemical Physics. 106 (5): 1863. Bibcode:1997JChPh
Methanium
File system
the need to maintain cluster awareness to prevent any data corruption or discrepancies in cache, the clusters are tightly coupled and communicate over
Veritas_Cluster_File_System
Method in quantum chemistry
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Multi-configurational self-consistent field
Multi-configurational_self-consistent_field
Chemical element with atomic number 118 (Og)
Ionization potentials and electron affinity of oganesson with relativistic coupled cluster method". In Musiał, Monika; Hoggan, Philip E. (eds.). Advances in Quantum
Oganesson
Quantum-mechanical framework for simulating molecules and solids
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Görling–Levy perturbation theory
Görling–Levy_perturbation_theory
Hungarian theoretical chemist (born 1955)
in coupled-cluster theory", The Journal of Chemical Physics 115, 2945 (2001); doi:10.1063/1.1383290 "A general state-selective multireference coupled-cluster
Péter_Surján
Solid state physics calculation technique
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Projector augmented wave method
Projector_augmented_wave_method
Probabilistic algorithms to simulate quantum many-body systems
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Quantum_Monte_Carlo
Physical model of solid metals as electron gases
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Nearly_free_electron_model
Approximation in many-body systems
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
GW_approximation
American chemist
Professor Scuseria has made contributions to density functional theory, coupled cluster theory and the theory of carbon nanomaterials. Recent research thrusts
Gustavo_Scuseria
Chemical compound
effects for molecules of heavy elements: Ab initio fully relativistic coupled-cluster calculations for PbH4". International Journal of Quantum Chemistry
Plumbane
Quantum mechanical description of electronic structure
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Coulson–Fischer_theory
Alessio, Maristella; Krylov, Anna I. (2021-06-30). "Equation-of-Motion Coupled-Cluster Protocol for Calculating Magnetic Properties: Theory and Applications
List of quantum chemistry and solid-state physics software
List_of_quantum_chemistry_and_solid-state_physics_software
One of two foundational theories of quantum chemistry
should be in the bond region. Valence bond theory views bonds as weakly coupled orbitals (small overlap). Valence bond theory is typically easier to employ
Valence_bond_theory
accuracy of the corrected energies can be similar to results from coupled cluster theory calculations. The Davidson correction does not give information
Davidson_correction
Chemical element with atomic number 87 (Fr)
Yuliya; Meniailava, Darya; Shundalau, Maksim (2024). "Relativistic coupled cluster study on the spectroscopic and radiative properties of the KFr molecule
Francium
Solid-state physics model
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
K·p_perturbation_theory
Quantum-mechanical framework for simulating molecules and solids
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Optimized effective potential method
Optimized_effective_potential_method
Quantum-mechanical framework for simulating molecules and solids
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Time-dependent density functional theory
Time-dependent_density_functional_theory
Method in ab initio Quantum Chemistry
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Møller–Plesset perturbation theory
Møller–Plesset_perturbation_theory
antiferromagnet on square, triangular, and cubic lattices using the coupled-cluster method". Physical Review B. 73 (9) 094404. arXiv:cond-mat/0601691.
Spin_stiffness
Quantum chemistry method extending valence bond theory
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Generalized_valence_bond
Concept in chemistry
Felix; Grüneis, Andreas (28 December 2021). "Surface science using coupled cluster theory via local Wannier functions and in-RPA-embedding: The case of
Intrinsic_bond_orbitals
Electromagnetic phenomenon
be substantial for even simple systems like the ammonia molecule. Coupled cluster theory (especially CCSD(T)) can give very accurate dipole moments,
Dipole
methods Møller–Plesset perturbation theory Configuration interaction Coupled cluster Multi-configurational self-consistent field Quantum chemistry composite
Model_solid_approximation
Theoretical chemical element with atomic number 119 (Uue)
Pernpointner, Markus; Seth, Michael; et al. (1999). "Relativistic coupled-cluster static dipole polarizabilities of the alkali metals from Li to element
Ununennium
Quantum algorithm
A common method to obtain a valid ansatz is given by the unitary coupled cluster (UCC) framework and its extensions. If the ansatz is not chosen adequately
Variational quantum eigensolver
Variational_quantum_eigensolver
Chemistry software
techniques such as many-body perturbation theory (MBPT) and, in particular coupled cluster techniques to treat electron correlation. The development of ACES II
ACES (computational chemistry)
ACES_(computational_chemistry)
Large-scale study of proteins
correspondence between transcriptomic and proteomic expression profiles using coupled cluster models". Bioinformatics. 24 (24): 2894–2900. doi:10.1093/bioinformatics/btn553
Proteomics
Computational chemistry software
(written by Jeppe Olsen), new integral code (written by Roland Lindh) and coupled cluster code (written at Comenius University). MOLCAS 4 (1999) was a first
MOLCAS
Chemical element with atomic number 111 (Rg)
stability of high oxidation states in group 11 elements: Relativistic coupled cluster calculations for the di-, tetra- and hexafluoro metallates of Cu, Ag
Roentgenium
Computational chemistry program
such as density functional theory, second–order Møller-Plesset and coupled cluster theory. Aside from energies and structures, an assortment of optical
TURBOMOLE
Density-based data clustering algorithm
algorithm itself can be used to cluster the data. Distance function: The choice of distance function is tightly coupled to the choice of ε, and has a major
DBSCAN
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