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QS3

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An exact diagonalization package for efficiently solving quantum spin 1/2 lattice models in almost fully spin-polarized sectors. QS3 can treat such systems with quite large system sizes, over 1000 sites. It supports calculations of wavenumber-dependence of energy-dispersion and dynamical spin structure factor.

Information
Last Update:2022/03/01

Official site

https://github.com/QS-Cube/ED

License

MIT licence

Availability

Fortran
(BLAS/LAPACK libraries are required)
Core Developers

Hiroshi Ueda (Osaka University)
Tokuro Shimokawa (OIST)
Target substance/model

Quantum spin 1/2 lattice models with U(1) and translational symmetries.
Physical quantities that can be computed
  • Energy
  • Magnetic moment
  • Two-body correlation functions
  • Static/dynamical spin structure factor
Methodology

Exact diagonalization method(full diagonalization method, Lanczos method, thick-restart Lanczos method)
Parallelization

OpenMP
Related keywords
Document

https://arxiv.org/abs/2107.00872
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