Rimu.jl: Random integrators for many-body quantum systems
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866917225201401856 |
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| author | Čufar, Matija Bradly, C. J. Yang, Ray Pahl, Elke Brand, Joachim |
| author_facet | Čufar, Matija Bradly, C. J. Yang, Ray Pahl, Elke Brand, Joachim |
| contents | Rimu.jl is a Julia package for solving many-body quantum problems. The core of the package is a matrix-free implementation of Hamiltonians and other operators and compact representation of Fock states, which together allow for efficient methods suitable for high-performance computing. Rimu.jl includes a Julia implementation of the full configuration interaction quantum Monte Carlo (FCIQMC) algorithm which is a type of projector QMC algorithm for stochastically solving the time-independent Schrödinger equation. It also includes many well-known model Hamiltonians, and an interface for exact diagonalisation based on external eigenvalue solvers. Both the stochastic and exact diagonalisation methods are accessed with a CommonSolve.jl interface. We describe the FCIQMC algorithm and how to obtain estimators of observables as well as the key features of the implementation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_19505 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Rimu.jl: Random integrators for many-body quantum systems Čufar, Matija Bradly, C. J. Yang, Ray Pahl, Elke Brand, Joachim Computational Physics Rimu.jl is a Julia package for solving many-body quantum problems. The core of the package is a matrix-free implementation of Hamiltonians and other operators and compact representation of Fock states, which together allow for efficient methods suitable for high-performance computing. Rimu.jl includes a Julia implementation of the full configuration interaction quantum Monte Carlo (FCIQMC) algorithm which is a type of projector QMC algorithm for stochastically solving the time-independent Schrödinger equation. It also includes many well-known model Hamiltonians, and an interface for exact diagonalisation based on external eigenvalue solvers. Both the stochastic and exact diagonalisation methods are accessed with a CommonSolve.jl interface. We describe the FCIQMC algorithm and how to obtain estimators of observables as well as the key features of the implementation. |
| title | Rimu.jl: Random integrators for many-body quantum systems |
| topic | Computational Physics |
| url | https://arxiv.org/abs/2601.19505 |