منابع مشابه
Ward Identities for Interacting Electronic Systems
A Ward-Takahashi identity, as a consequence of gauge invariance and in a form that relates self-energy to the two-particle Bethe-Salpeter scattering kernel, was first derived by Vollhardt and Wölfle for a system of independent particles moving in a random medium. This is generalized to a class of interacting electronic systems in materials with or without random impurities, following a procedur...
متن کاملInvariance , Background Fields and Modified Ward Identities
In this talk the gauge symmetry for Wilsonian flows in pure Yang-Mills theories is discussed. The background field formalism is used for the construction of a gauge invariant effective action. The symmetries of the effective action under gauge transformations for both the gauge field and the auxiliary background field are separately evaluated. Modified Ward-Takahashi and background field identi...
متن کاملWard identities for disordered metals and superconductors
This article revisits Ward identities for disordered interacting normal metals and superconductors. It offers a simple derivation based on gauge invariance and recasts the identities in a new form that allows easy analysis of the quasiparticle charge conservation (as e.g. in a normal metal) or non-conservation (as e.g. in a d-wave superconductor).
متن کاملNon-perturbative Renormalization Constants using Ward Identities
Tanmoy Bhattacharya, a Shailesh Chandrasekharan, Rajan Gupta, Weonjong Lee, and Stephen Sharpe c,d MS B-285, Los Alamos National Lab, Los Alamos, New Mexico 87545, USA Department of Physics, Duke University, Durham, North Carolina 27705, USA Physics Department, University of Washington, Seattle, Washington 98195, USA Center for Computational Physics, University of Tsukuba, Tsukuba, Ibaraki, 305...
متن کاملSuperconformal Ward Identities and Their Solution
Superconformal Ward identities are derived for the the four point functions of chiral primary BPS operators for N = 2, 4 superconformal symmetry in four dimensions. Manipulations of arbitrary tensorial fields are simplified by introducing a null vector so that the four point functions depend on two internal R-symmetry invariants as well as two conformal invariants. The solutions of these identi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2019
ISSN: 1434-6044,1434-6052
DOI: 10.1140/epjc/s10052-019-6682-y