Results 51 to 60 of about 821 (184)

Small polaron with generic open boundary conditions: Exact solution via the off-diagonal Bethe ansatz

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, Junpeng Cao, Kun Hao, Zhan-Ying Yang, Wen-Li Yang   +4 more
doaj   +1 more source

Semiclassical Bethe ansatz and AdS/CFT [PDF]

Fortschritte der Physik, 2005
AbstractThe Bethe ansatz can be used to compute anomalous dimensions in 𝒩 = 4 SYM theory. The classical solutions of the sigma‐model on AdS5 × S5 can also be parameterized by an integral equation of Bethe type. The relationship between the two Bethe ansätze is reviewed.
openaire   +3 more sources

Beyond Electrons: Correlation and Self‐Energy in Multicomponent Density Functional Theory

ChemPhysChem, Volume 25, Issue 13, July 2, 2024.
Developing robust methods to describe the behavior of fermions embedded into an electronic system is vital to computationally tackle these complicated quantum systems. Introducing various new approaches, including a common auxiliary subspace multicomponent resolution‐of‐the‐identity approach, this work provides powerful techniques to extract ...
Christof Holzer, Yannick J. Franzke
wiley   +1 more source

Introduction to the Bethe Ansatz II

Computers in Physics, 1998
Building on the fundamentals introduced in part I, we employ the Bethe ansatz to study some ground-state properties (energy, magnetization, susceptibility) of the one-dimensional s=1/2 Heisenberg antiferromagnet in zero and nonzero magnetic field. The 2-spinon triplet and singlet excitations from the zero-field ground state are discussed in detail, and
Karbach, Michael, Hu, Kun, Müller, Gerhard   +2 more
openaire   +5 more sources

Thermodynamic Bethe ansatz with Haldane statistics [PDF]

Nuclear Physics B, 1998
21 pages latex+3 figures.
Bytsko, A. G., Fring, A.
openaire   +4 more sources

Classical and quantum theory of fluctuations for many‐particle systems out of equilibrium

Contributions to Plasma Physics, Volume 64, Issue 5, June 2024.
Abstract Correlated classical and quantum many‐particle systems out of equilibrium are of high interest in many fields, including dense plasmas, correlated solids, and ultracold atoms. Accurate theoretical description of these systems is challenging both, conceptionally and with respect to computational resources.
E. Schroedter, M. Bonitz
wiley   +1 more source

Spin-$s$ rational $Q$-system

SciPost Physics
Bethe Ansatz equations for spin-s Heisenberg spin chain with s≥1 are significantly more difficult to analyze than the spin-$\tfrac{1}{2}$ case, due to the presence of repeated roots. As a result, it is challenging to derive extra conditions for the Bethe
Jue Hou, Yunfeng Jiang, Rui-Dong Zhu
doaj   +1 more source

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

Periodic Cellular Automata and Bethe Ansatz [PDF]

Differential Geometry and Physics, 2006
8 ...
Kuniba, Atsuo, Takenouchi, Akira
openaire   +2 more sources

Präparierte Emotionen: Formen der Trauer im Umgang mit der Stellerschen Seekuh

The German Quarterly, Volume 97, Issue 3, Page 299-318, Summer 2024.
Abstract Wie werden Emotionen im Kontext des Artenverlusts eingesetzt? In welchem Ausmaß sind sie steuerbar und für welche Zwecke werden sie genutzt? Anhand des Beispiels der Stellerschen Seekuh fragt der Artikel nach Formen der Trauer im Umgang mit der Auslöschung und den Überresten des marinen Säugetiers.
Romana Bund
wiley   +1 more source