Results 41 to 50 of about 821 (184)
Exact solution of the Izergin-Korepin Gaudin model with periodic and open boundaries
SciPost Physics CoreWe study the Izergin-Korepin Gaudin models with both periodic and open integrable boundary conditions, which describe quantum systems exhibiting novel long-range interactions.
Xiaotian Xu, Pei Sun, Xin Zhang, Junpeng Cao, Tao Yang
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Exact solution of the sp(4) integrable spin chain with generic boundaries
Journal of High Energy Physics, 2019 The off-diagonal Bethe ansatz method is generalized to the integrable model associated with the sp(4) (or C 2) Lie algebra. By using the fusion technique, we obtain the complete operator product identities among the fused transfer matrices.
Guang-Liang Li +7 more
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Bethe ansatz for QCD pomeron [PDF]
Nuclear Physics B, 1995 43 pages, LaTeX style, (one reference added)
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Embedded Many‐Body Green's Function Methods for Electronic Excitations in Complex Molecular Systems
WIREs Computational Molecular Science, Volume 14, Issue 6, November/December 2024.ABSTRACT Many‐body Green's function theory in the GW approximation with the Bethe–Salpeter equation (BSE) provides a powerful framework for the first‐principles calculations of single‐particle and electron–hole excitations in perfect crystals and molecules alike. Application to complex molecular systems, for example, solvated dyes, molecular aggregates,
Gianluca Tirimbó +2 more
wiley +1 more source
Bethe ansatz and isomondromy deformations [PDF]
Theoretical and Mathematical Physics, 2009 We study symmetries of the Bethe equations for the Gaudin model appeared naturally in the framework of the geometric Langlands correspondence under the name of Hecke operators and under the name of Schlesinger transformations in the theory of isomonodromic deformations, and particularly in the theory of Painlev transcendents.
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Heavenly metrics, hyper‐Lagrangians and Joyce structures
Journal of the London Mathematical Society, Volume 110, Issue 5, November 2024.Abstract In [Proc. Sympos. Pure Math., American Mathematical Society, Providence, RI, 2021, pp. 1–66], Bridgeland defined a geometric structure, named a Joyce structure, conjectured to exist on the space M$M$ of stability conditions of a CY3$CY_3$ triangulated category.
Maciej Dunajski, Timothy Moy
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Introduction to the nested algebraic Bethe ansatz
SciPost Physics Lecture Notes, 2020 We give a detailed description of the nested algebraic Bethe ansatz. We consider integrable models with a $\mathfrak{gl}_3$-invariant $R$-matrix as the basic example, however, we also describe possible generalizations.
N. A. Slavnov
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Two‐Time Quantum Fluctuations Approach and Its Relation to the Bethe–Salpeter Equation
physica status solidi (b), Volume 261, Issue 9, September 2024.The Bethe–Salpeter equation is combined with the generalized Kadanoff–Baym ansatz to derive a two‐time version of the GW approximation. This approximation is compared to the polarization approximation to show the relation between the two‐time fluctuations approach and the Bethe–Salpeter equation. Nonequilibrium results for the density response function
Erik Schroedter, Michael Bonitz
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Bethe ansatz for quantum-deformed strings
Journal of High Energy Physics, 2021 Two distinct η-deformations of strings on AdS5 ×S5 can be defined; both amount to integrable quantum deformations of the string non-linear sigma model, but only one is itself a superstring background.
Fiona K. Seibold, Alessandro Sfondrini
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Accelerating Nonequilibrium Green Functions Simulations: The G1–G2 Scheme and Beyond
physica status solidi (b), Volume 261, Issue 9, September 2024.This article reviews recent developments in the theory of nonequilibrium Green functions (NEGF) where dramatic accelerations are achieved within the time‐local G1–G2 scheme. As a result, longer simulations with more accurate selfenergies are possible. The figure shows an illustration ‐ optical excitation of graphene by a short laser pulse: snapshot of ...
Michael Bonitz +5 more
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