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Integrable theory of the perturbation equations [PDF]
Chaos, Solitons & Fractals, 1996 An integrable theory is developed for the perturbation equations engendered from small disturbances of solutions. It includes various integrable properties of the perturbation equations: hereditary recursion operators, master symmetries, linear representations (Lax and zero curvature representations) and Hamiltonian structures etc.
Ma, W. X., Fuchssteiner, B.
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Physical Review X, 2021 Thanks to the nearsightedness principle, the low-energy electronic structure of solids can be represented by localized states such as the Wannier functions.
Jae-Mo Lihm, Cheol-Hwan Park
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Lattice perturbation theory [PDF]
Physics Reports, 2003 Latex, 221 pages, 3 figures, uses rmpbib.sty and axodraw.sty (included); references added as well as corresponding ...
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A perturbation correction of the Flory-Huggins polymer solution theory
Condensed Matter Physics, 2005 A perturbation theory modification of the Flory-Huggins polymer solution theory is presented. The proposed perturbation equation utilizes the results by Tukur et al [J. Chem. Phys.
G.A.Mansoori
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Massive renormalization scheme and perturbation theory at finite temperature
Physics Letters B, 2015 We argue that the choice of an appropriate, massive, renormalization scheme can greatly improve the apparent convergence of perturbation theory at finite temperature.
Jean-Paul Blaizot, Nicolás Wschebor
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Closed form bound-state perturbation theory
International Journal of Mathematics and Mathematical Sciences, 1980 The perturbed Schrödinger eigenvalue problem for bound states is cast into integral form using Green's Functions. A systematic algorithm is developed and applied to the resulting equation giving rise to approximate solutions expressed as functions of the
Ollie J. Rose, Carl G. Adler
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Long Wavelength Coherency in Well Connected Electric Power Networks
IEEE Access, 2022 We investigate coherent oscillations in large scale transmission power grids, where large groups of generators respond in unison to a distant disturbance. Such long wavelength coherent phenomena are known as inter-area oscillations.
Julian Fritzsch, Philippe Jacquod
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On the breakdown of perturbation theory [PDF]
Theoretical and Mathematical Physics, 1993 The production of o(1/g^2) particles in a weakly-coupled theory is believed to be non-perturbatively suppressed. I comment on the prospects of (a) establishing this rigorously, and (b) estimating the effect to exponential accuracy semiclassically, by discussing two closely-related problems: the large-order behaviour of few-point Green functions, and ...
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Density-functional perturbation theory goes time-dependent
Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2008 The scope of time-dependent density-functional theory (TDDFT) is limited to the lowest portion of the spectrum of rather small systems (a few tens of atoms at most).
Gebauer, Ralph +2 more
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BPS multi-vortices in chiral perturbation theory [PDF]
EPJ Web of ConferencesWe show that a BPS bound can be derived from chiral perturbation theory minimally coupled to electrodynamics at a finite isospin chemical potential.
Vera Aldo
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