Results 11 to 20 of about 22,526 (213)
Algorithmic Error Mitigation Scheme for Current Quantum Processors [PDF]
Quantum, 2021 We present a hardware agnostic error mitigation algorithm for near term quantum processors inspired by the classical Lanczos method. This technique can reduce the impact of different sources of noise at the sole cost of an increase in the number of ...
Philippe Suchsland +5 more
doaj +1 more source
Microcanonical Lanczos method [PDF]
Philosophical Magazine, 2006 In this article, the development of a novel numerical simulation method based on the Lanczos technique and the microcanonical statistical ensemble is discussed. It allows the evaluation of finite temperature dynamic correlations for quantum many-body systems on lattices larger than hitherto possible.
openaire +1 more source
Double k-Grid Method for Solving the Bethe-Salpeter Equation via Lanczos Approaches
Frontiers in Chemistry, 2022 Convergence with respect to the size of the k-points sampling grid of the Brillouin zone is the main bottleneck in the calculation of optical spectra of periodic crystals via the Bethe-Salpeter equation (BSE).
Ignacio M. Alliati +2 more
doaj +1 more source
Numerical analysis of the spectrum of the Dirac operator in four-dimensional SU(2) gauge fields [PDF]
, 1995 Two numerical algorithms for the computation of eigenvalues of Dirac operators in lattice gauge theories are described: one is an accelerated conjugate gradient method, the other one a standard Lanczos method.
Alexandrou +28 more
core +2 more sources
Physics, 2022 Nuclear shell model is a powerful approach to investigate nuclear structure microscopically. However, the computational cost of shell-model calculations becomes huge in medium-heavy nuclei.
Noritaka Shimizu
doaj +1 more source
Journal of Mathematical and Fundamental Sciences, 2018 A new method to treat the inherent instability of Lanczos-type algorithms is introduced. It enables us to capture the properties of the sequence of iterates generated by a Lanczos-type algorithm by interpolating on this sequence of points.
Maharani +2 more
doaj +1 more source
Low Complexity Precoding Based on Lanczos Method in Massive MIMO System [PDF]
Jisuanji gongcheng, 2019 Aiming at the problem that the computational complexity of the required matrix inversion of Zero Forcing(ZF) precoding matrix is very high due to the large number of antennas and users in large-scale MIMO systems,a low complexity ZF precoding scheme ...
CAO Haiyan,ZHOU Dong,FANG Xin,WANG Xiumin
doaj +1 more source
The Anderson model of localization: a challenge for modern eigenvalue methods [PDF]
, 1997 We present a comparative study of the application of modern eigenvalue algorithms to an eigenvalue problem arising in quantum physics, namely, the computation of a few interior eigenvalues and their associated eigenvectors for the large, sparse, real ...
Elsner, U. +4 more
core +4 more sources
An alternative implementation of the Lanczos algorithm for wave function propagation [PDF]
, 2006 We reformulate the Lanczos algorithm for quantum wave function propagation in terms of variational principle. By including some basis states of previous time steps into the variational subspace, the resultant accuracy increases by several orders ...
Jie, Quanlin, Liu, Dunhuan
core +1 more source
SoftNet: A Package for the Analysis of Complex Networks
Algorithms, 2022 Identifying the most important nodes according to specific centrality indices is an important issue in network analysis. Node metrics based on the computation of functions of the adjacency matrix of a network were defined by Estrada and his collaborators
Caterina Fenu +2 more
doaj +1 more source