Random Phase Approximation Applied to Many-Body Noncovalent Systems.
Sign Up to like & getrecommendations! Published in 2019 at "Journal of chemical theory and computation"
DOI: 10.1021/acs.jctc.9b00979
Abstract: The random phase approximation (RPA) has received a considerable interest in the field of modeling systems where noncovalent interactions are important. Its advantages over widely used density functional theory (DFT) approximations are the exact treatment… read more here.
Keywords: phase approximation; many body; approximation applied; random phase ... See more keywords
Phase stability of the argon crystal: first-principles study based on random phase approximation plus renormalized single excitation corrections
Sign Up to like & getrecommendations! Published in 2022 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ac5c19
Abstract: The energy differences between the face-centered cubic (fcc) and hexagonal closed packed (hcp) structures of the argon (Ar) crystal are studied using the first-principles electronic-structure approach at the level of random phase approximation (RPA) plus… read more here.
Keywords: phase; argon crystal; plus renormalized; random phase ... See more keywords
Study of static and dynamic properties of even-even 14–24O and 38–54Ca in the frame of Random Phase Approximation (RPA) method with different Skyrme parameterizations
Sign Up to like & getrecommendations! Published in 2021 at "Physica Scripta"
DOI: 10.1088/1402-4896/abe9f0
Abstract: The static and dynamic nuclear properties for neutron rich oxygen and calcium isotopes have been calculated using the framework of the random phase approximation method with different Skyrme parameterizations namely; SyO-, SyO+, BSk17, SLy4, SLy5,… read more here.
Keywords: static dynamic; random phase; phase approximation; method different ... See more keywords
Erratum: Simple self-interaction correction to random-phase-approximation-like correlation energies [Phys. Rev. A 100, 022515 (2019)]
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review A"
DOI: 10.1103/physreva.101.059902
Abstract: The random phase approximation (RPA) is exact for the exchange energy of a many-electron ground state, but RPA makes the correlation energy too negative by about 0.5 eV/electron. That large short-range error, which tends to… read more here.
Keywords: phase approximation; electron; random phase; energy ... See more keywords
Conditions where random phase approximation becomes exact in the high-density limit
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.155147
Abstract: It is shown that in $d$-dimensional systems, the vertex corrections beyond the random phase approximation (RPA) or GW approximation scales with the power $d-\beta-\alpha$ of the Fermi momentum if the relation between Fermi energy and… read more here.
Keywords: phase approximation; high density; density; density limit ... See more keywords
Beyond the random phase approximation with a local exchange vertex
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.98.045117
Abstract: With the aim of constructing an electronic structure approach that systematically goes beyond the GW and random phase approximation (RPA) we introduce a vertex correction based on the exact-exchange (EXX) potential of time-dependent density functional… read more here.
Keywords: beyond random; phase approximation; exchange; vertex ... See more keywords
Limitations of constrained random phase approximation downfolding
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.98.235151
Abstract: We check the accuracy of the constrained random phase approximation (cRPA) downfolding scheme by considering one-dimensional two- and three-orbital Hubbard models with a target band at the Fermi level and one or two screening bands… read more here.
Keywords: limitations constrained; random phase; constrained random; phase approximation ... See more keywords
Low-lying collective excited states in nonintegrable pairing models based on the stationary-phase approximation to the path integral
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review C"
DOI: 10.1103/physrevc.98.064327
Abstract: For a description of large-amplitude collective motion associated with nuclear pairing, requantization of time-dependent mean-field dynamics is performed using the stationary-phase approximation (SPA) to the path integral. We overcome the difficulty of the SPA, which… read more here.
Keywords: phase approximation; stationary phase; low lying; pairing models ... See more keywords
Renormalizing random-phase approximation by using exact pairing
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review C"
DOI: 10.1103/physrevc.99.064322
Abstract: A fully self-consistent renormalized random-phase approximation is constructed based on the self-consistent Hartree-Fock mean field plus exact pairing solutions (EP). This approach exactly conserves the particle number and restores the energy-weighted sum rule, which is… read more here.
Keywords: neutron rich; random phase; phase approximation; exact pairing ... See more keywords
Semiclassical evaluation of expectation values.
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review E"
DOI: 10.1103/physreve.102.042211
Abstract: Semiclassical mechanics allows for a description of quantum systems which preserves their phase information, and thus interference effects, while using only the system's classical dynamics as an input. In particular one of the strengths of… read more here.
Keywords: phase approximation; expectation values; stationary phase; expectation ... See more keywords