Results 11 to 20 of about 11,559,793 (316)

Electronic excitations: density-functional versus many-body Green’s-function approaches [PDF]

open access: green, 2002
Electronic excitations lie at the origin of most of the commonly measured spectra. However, the first-principles computation of excited states requires a larger effort than ground-state calculations, which can be very efficiently carried out within ...
Giovanni Onida   +2 more
openalex   +2 more sources

Green’s function in the color field of a large nucleus [PDF]

open access: greenPhysical Review D, Particles and fields, 1994
We compute the Green's function for scalars, fermions, and vectors in the color field associated with the infinite momentum frame wave function of a large nucleus.
Larry McLerran, Raju Venugopalan
openalex   +3 more sources

Hermite-Hadamard type inequalities for fractional integrals via Green's function. [PDF]

open access: yesJ Inequal Appl, 2018
In the article, we establish the left Riemann–Liouville fractional Hermite–Hadamard type inequalities and the generalized Hermite–Hadamard type inequalities by using Green’s function and Jensen’s inequality, and present several new Hermite–Hadamard type ...
Adil Khan M, Iqbal A, Suleman M, Chu YM.
europepmc   +2 more sources

Self-Consistent Green's Function Theory for Atomic Nuclei [PDF]

open access: yesFrontiers of Physics, 2020
Nuclear structure theory has recently gone through a major renewal with the development of ab initio techniques that can be applied to a large number of atomic nuclei, well-beyond the light sector that had been traditionally targeted in the past.
V. Somà
semanticscholar   +1 more source

Green's function methods for single molecule junctions. [PDF]

open access: yesJournal of Chemical Physics, 2020
We present a brief pedagogical review of theoretical Green's function methods applicable to open quantum systems out of equilibrium, in general, and single molecule junctions, in particular.
G. Cohen, Michael Galperin
semanticscholar   +1 more source

On a nabla fractional boundary value problem with general boundary conditions

open access: yesAIMS Mathematics, 2020
In this article, we consider a nabla fractional boundary value problem with general boundary conditions. Brackins & Peterson [5] gave an explicit expression for the corresponding Green’s function.
Jagan Mohan Jonnalagadda
doaj   +1 more source

Riquier–Neumann Problem for the Polyharmonic Equation in a Ball

open access: yesMathematics, 2023
The Green’s function of the Riquier–Neumann problem for the polyharmonic equation in the unit ball is constructed. Using the obtained Green’s function, an integral representation of the solution to the Riquier–Neumann problem in the unit ball is found.
Valery Karachik
doaj   +1 more source

Calculating the Green’s function of two-site fermionic Hubbard model in a photonic system

open access: yesNew Journal of Physics, 2022
The Green’s function has been an indispensable tool to study many-body systems that remain one of the biggest challenges in modern quantum physics for decades. The complicated calculation of the Green’s function impedes the research of many-body systems.
Jie Zhu   +4 more
doaj   +1 more source

Nodal Green?s Function Method Singular Source Term and Burnable Poison Treatment in Hexagonal Geometry [PDF]

open access: yes, 2009
An accurate and computationally efficient two or three-dimensional neutron diffusion model will be necessary for the development, safety parameters computation, and fuel cycle analysis of a prismatic Very High Temperature Reactor (VHTR) design under Next Generation Nuclear Plant Project (NGNP).
Bingham, A. A.   +2 more
openaire   +3 more sources

Steady-state Green’s function solution for moving media with axial conduction

open access: yesInternational Journal of Heat and Mass Transfer, 2010
The objective of this presentation is the development of a generalized steady-state Green’s function solution to study the temperature field in moving bodies. This type of solution permits the inclusion of different nonhomogeneous boundary conditions, volumetric heat sources, and possible position-dependent thermophysical properties.
Haji-Sheikh, A.   +2 more
openaire   +3 more sources

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