The Bethe–Salpeter equation is a general quantum field theoretical tool, thus applications for it can be found in any quantum field theory. Some examples are positronium (bound state of an electron – positron pair), excitons (bound states of an electron–hole pairs [3] ), and mesons (as quark -antiquark bound … See more The Bethe–Salpeter equation (named after Hans Bethe and Edwin Salpeter) describes the bound states of a two-body (particles) quantum field theoretical system in a relativistically covariant formalism. The equation was … See more The starting point for the derivation of the Bethe–Salpeter equation is the two-particle (or four point) Dyson equation in momentum … See more As for any homogeneous equation, the solution of the Bethe–Salpeter equation is determined only up to a numerical factor. This factor has to be specified by a certain normalization condition. For the Bethe–Salpeter amplitudes this is usually done by demanding … See more Many modern quantum field theory textbooks and a few articles provide pedagogical accounts for the Bethe–Salpeter equation's context and uses. See: See more In principle the interaction kernel K contains all possible two-particle-irreducible interactions that can occur between the two … See more • ABINIT • Araki–Sucher correction • Breit equation • Lippmann–Schwinger equation • Schwinger–Dyson equation See more • BerkeleyGW – plane-wave pseudopotential method • ExC - plane wave • Fiesta - Gaussian all-electron method See more Web1 day ago · in the second step (Time dependent Bethe Salpeter equation). The first step (The Real Time Collisions) is performed successfully. And I have reproduced the RT-BSE spectrum of 2D h-BN successfully. More details can be found in the attachments. Any suggestion will be appreciated.

Optical and magneto-optical properties of ferromagnetic …

WebJul 20, 2015 · Linear optical properties can be accurately calculated using the Bethe-Salpeter equation. After introducing a suitable product basis for the electron-hole pairs, the Bethe-Salpeter equation is usually recast into a complex non-Hermitian eigenvalue problem that is difficult to solve using standard eigenvalue solvers. WebCreate and go to 3-kernel directory. In this directory we calculate the kernel of the Bethe-Salpeter equation (BSE) using the Kernel code from BerkeleyGW. The kernel is calculated on a coarse 4x4x4 grid. This is the same grid on which the self energy Sigma was calculated, but one could have used different grids. huarache crocs sandals

Quasiparticle Self-Consistent GW-Bethe-Salpeter Equation …

WebMay 5, 2016 · The introduction of GW approximation to the electron's self-energy by Hedin in the 1960s, where G and W denote the one-particle Green's function and the screened Coulomb interaction, respectively, … WebWe theoretically investigate lead iodide perovskites of general formula APbI 3 for a series of metallic cations (namely Cs +, Rb +, K +, Na + and Li +) by means of density functional theory, the GW method and the Bethe–Salpeter equation including spin–orbit coupling.We demonstrate that the low-energy edges (up to 1.3 eV) of the absorption spectra are … WebApr 8, 2024 · Thus, the GW-Bethe-Salpeter equation is useful for gaining deeper understanding into the defect-induced transitions. Here we find that the nature of Q1 and Q2 can be viewed as mixed states of ... huarache df