Results 61 to 70 of about 132,022 (206)
On the spectrum of the AdS(5) x S-5 string at large lambda [PDF]
, 2011 archiveprefix: arXiv primaryclass: hep-th reportnumber: HU-EP-10-85 slaccitation: %%CITATION = ARXIV:1012.4471;%%archiveprefix: arXiv primaryclass: hep-th reportnumber: HU-EP-10-85 slaccitation: %%CITATION = ARXIV:1012.4471;%
Filippo Passerini +11 more
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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
doaj +1 more source
Attainable bounds for algebraic connectivity and maximally connected regular graphs
Journal of Graph Theory, Volume 107, Issue 3, Page 522-549, November 2024.Abstract We derive attainable upper bounds on the algebraic connectivity (spectral gap) of a regular graph in terms of its diameter and girth. This bound agrees with the well‐known Alon–Boppana–Friedman bound for graphs of even diameter, but is an improvement for graphs of odd diameter. For the girth bound, we show that only Moore graphs can attain it,
Geoffrey Exoo +3 more
wiley +1 more source
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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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 QUANTUM GROUPS
Quantum Groups, Integrable Statistical Models and Knot Theory, 1993 The formulation and resolution of integrable lattice statistical models in a quantum group covariant way is the subject of this review. The Bethe Ansatz turns to be remarkably useful to implement quantum group symmetries and to provide quantum group representations even when $q$ is a root of unity.
openaire +2 more sources
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
wiley +1 more source
Perturbative and non-perturbative studies in low dimensional quantum field theory [PDF]
, 2007 A relevant perturbation of a conformal field theory (CFT) on the half-plane, by both a bulk and boundary operator, often leads to a massive theory with a particle description in terms of the bulk S-matrix and boundary reflection factor R.
Lishman, Anna Rebecca
core
Heisenberg XXX Model with General Boundaries: Eigenvectors from Algebraic Bethe Ansatz
Symmetry, Integrability and Geometry: Methods and Applications, 2013 We propose a generalization of the algebraic Bethe ansatz to obtain the eigenvectors of the Heisenberg spin chain with general boundaries associated to the eigenvalues and the Bethe equations found recently by Cao et al.
Samuel Belliard, Nicolas Crampé
doaj +1 more source
Nuclear Physics B, 2015 The small polaron, a one-dimensional lattice model of interacting spinless fermions, with generic non-diagonal boundary terms is studied by the off-diagonal Bethe ansatz method. The presence of the Grassmann valued non-diagonal boundary fields gives rise
Xiaotian Xu +4 more
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