Výsledky vyhledávání - "gradient expansion"

Resummation and cancellation of the VIA source in electroweak baryogenesis

Autor: Marieke Postma, Jorinde van de Vis, Graham White

Publikováno v: Journal of High Energy Physics
Journal of high energy physics 12(12), 121 (2022). doi:10.1007/JHEP12(2022)121

Journal of high energy physics 12(12), 121 (2022). doi:10.1007/JHEP12(2022)121
We re-derive the vev-insertion approximation (VIA) source in electroweak baryogenesis. In contrast to the original derivation, we rely solely on 1-particle-irreducibl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b4546d5506bc933fb12d23835e5e778
https://bib-pubdb1.desy.de/record/478772

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Nonlocal exchange and correlation energy functionals using the Yukawa potential as ingredient: Application to the linear response of the uniform electron gas

Autor: Lucian A. Constantin, Fabio Della Sala, Fulvio Sarcinella, Eduardo Fabiano

Publikováno v: Physical Review B 104 (2021): 165114-1–165114-12. doi:10.1103/PhysRevB.104.165114
info:cnr-pdr/source/autori:Constantin L.A.; Sarcinella F.; Fabiano E.; Della Sala F./titolo:Nonlocal exchange and correlation energy functionals using the Yukawa potential as ingredient: Application to the linear response of the uniform electron gas/doi:10.1103%2FPhysRevB.104.165114/rivista:Physical Review B/anno:2021/pagina_da:165114-1/pagina_a:165114-12/intervallo_pagine:165114-1–165114-12/volume:104

We show that the reduced, dimensionless Yukawa potential ${y}_{\ensuremath{\alpha}}$ can be employed as an important ingredient in the construction of the exchange and correlation energy functionals. A functional based on ${y}_{\ensuremath{\alpha}}$

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd81c52c731e659bb934d2215fd805f2
https://doi.org/10.1103/physrevb.104.165114

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Akademický článek

Systematic corrections to the Thomas–Fermi approximation without a gradient expansion

Autor: Thanh Tri Chau, Jun Hao Hue, Martin-Isbjörn Trappe, Berthold-Georg Englert

Publikováno v: New Journal of Physics, Vol 20, Iss 7, p 073003 (2018)

We improve on the Thomas–Fermi approximation for the single-particle density of fermions by introducing inhomogeneity corrections. Rather than invoking a gradient expansion, we relate the density to the unitary evolution operator for the given effe

Externí odkaz: https://doaj.org/article/c9ff80fa07484a819409cd57682cf832

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Akademický článek

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Gradient expansion of the non-Abelian gauge-covariant Moyal star-product

Autor: Konschelle, François

Motivated by the recent developments of gauge-covariant methods in the phase-space, a systematic method is presented aiming at the generalisation of the Moyal star-product to a non-Abelian gauge covariant one at any order. Such an expansion contains

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e8d18f39d325ebc40aef7bc67dc4679

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