WebSpectrum from the Bethe-Salpeter equation¶ The screening plays a fundamental role in the Bethe-Salpeter equation and for 2D systems the screening requires a special treatment. In particular we use a truncated Coulomb interaction inorder to decouple the screening between periodic images. WebResearchGate
Real-time GW-BSE investigations on spin-valley exciton ... - Science
WebThe electron-hole correlation function obeys a Dyson equation known as the Bethe Salpeter equation (BSE) Here, and describes a non-interacting quasi-electron and quasi-hole pair. is the electron-hole interaction kernel.Following Strinati[Strinati1988] and Rohlfing and Louie[Rohlfing2000], the BSE can be written as an effective eigenvalue problem. swarm visiativ
Distinctive signatures of the spin- and momentum-forbidden dark …
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 actually first published in 1950 at the end of a paper by Yoichiro Nambu, but without derivation. Due … See more The starting point for the derivation of the Bethe–Salpeter equation is the two-particle (or four point) Dyson equation $${\displaystyle G=S_{1}\,S_{2}+S_{1}\,S_{2}\,K_{12}\,G}$$ in momentum … 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 See more • BerkeleyGW – plane-wave pseudopotential method • ExC - plane wave • Fiesta - Gaussian all-electron method 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 … 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: • W. Greiner, J. Reinhardt (2003). Quantum Electrodynamics … See more Web5 Apr 1995 · Bethe--Salpeter equation in QCD N. Brambilla, E. Montaldi, G. M. Prosperi (University of Milan) We extend to regular QCD the derivation of a confining Bethe- … Web1 May 2024 · Temperature-dependent transient absorption of and fluorescence from the excitons in the tubular aggregates aremore » marked by nonexponential decays with time scales ranging from a few ... By solving the first-principles many-body Bethe-Salpeter equation, we compare the optical properties of two prototype and technological relevant … swarm user interface