Results 101 to 110 of about 22,526 (213)

The Stochastic State Selection Method Combined with the Lanczos Approach to Eigenvalues in Quantum Spin Systems

, 2005
We describe a further development of the stochastic state selection method, a new Monte Carlo method we have proposed recently to make numerical calculations in large quantum spin systems.
De Raedt H, Hatano N, Munehisa T Munehisa Y, Richter J, Tomo Munehisa, Yasuko Munehisa   +5 more
core   +3 more sources

A Variant of the Inverted Lanczos Method

BIT Numerical Mathematics, 2001
In this note we study a variant of the inverted Lanczos method which computes eigenvalue approximates of a symmetric matrix A from the projection to a Krylov space of A method at least as long as reorthogonalization is not required. The method is applied to the problem of determining the smallest eigenvalue of a symmetric Toeplitz matrix.
openaire   +1 more source

Spot Position Extraction Based on High-resolution Parametric Subspace Method without Eigen decomposition

Wasit Journal of Engineering Sciences, 2013
This paper presents a subspace method of spot centroiding algorithm for locating the centers of laser spots. It focuses on how to find the position of the activated pixel which is the position of the imaged spot on the detector of the camera using ...
Azad Raheem Kareem
doaj   +1 more source

Lanczos eigensolution method for high-performance computers [PDF]

The theory, computational analysis, and applications are presented of a Lanczos algorithm on high performance computers. The computationally intensive steps of the algorithm are identified as: the matrix factorization, the forward/backward equation ...
Bostic, Susan W.
core   +1 more source

Applying the Liouville–Lanczos method of time-dependent density-functional theory to warm dense matter

Matter and Radiation at Extremes
Ab initio modeling of dynamic structure factors (DSF) and related density response properties in the warm dense matter (WDM) regime is a challenging computational task.
Zhandos A. Moldabekov, Sebastian Schwalbe, Thomas Gawne, Thomas R. Preston, Jan Vorberger, Tobias Dornheim   +5 more
doaj   +1 more source

Nonlinear spectroscopy as a magnon breakdown diagnosis and its efficient simulation

Physical Review Research
Identifying quantum spin liquids, magnon breakdown, or fractionalized excitations in quantum magnets is an ongoing challenge due to the ambiguity in interpreting excitation continua occurring in linear-response probes.
David A. S. Kaib, Marius Möller, Roser Valentí   +2 more
doaj   +1 more source

Magnetic field independent shape of the zero-energy landau levels in a disordered T3 model

New Journal of Physics, 2019
Using the Lanczos recursion method, we exactly determine the shape of the zero-energy Landau level (LL) in a disordered T _3 lattice under a strong magnetic field.
Zhi Yang, Weiwei Chen, Qunxiang Li, Q W Shi   +3 more
doaj   +1 more source

Dynamic Stability of an Elastic Rotating System: Shell-Disc-Shaft

International Journal of Rotating Machinery, 1997
This paper presents a methodology and some results on the dynamic stability of an elastic rotating system consisting of one- and twodimensional members. These parts may contain different kinds of unsymmetries: either from mass- or stiffness imperfections
P. Ruge, P. Senker
doaj   +1 more source

Inflationary Krylov complexity

Journal of High Energy Physics
In this work, we have systematically investigated the Krylov complexity of curvature perturbation for the modified dispersion relation in inflation, using the algorithm in closed system and open system.
Tao Li, Lei-Hua Liu
doaj   +1 more source

Magnetocaloric effect in quantum spin-s chains

Condensed Matter Physics, 2009
We compute the entropy of antiferromagnetic quantum spin-s chains in an external magnetic field using exact diagonalization and Quantum Monte Carlo simulations. The magnetocaloric effect, i.
A. Honecker, S. Wessel
doaj   +1 more source