QuantumToolbox.jl: An efficient Julia framework for simulating open quantum systems

POSTER

Abstract

We present QuantumToolbox.jl, an open-source Julia package for simulating open quantum systems. Designed with a syntax familiar to users of QuTiP, it harnesses Julia’s high-performance ecosystem to deliver fast and scalable simulations. The package includes a suite of time-evolution solvers supporting distributed computing and GPU acceleration, enabling efficient simulation of large-scale quantum systems. Moreover, it can integrate with automatic differentiation tools, making it well-suited for gradient-based optimization tasks such as quantum optimal control. Benchmark comparisons demonstrate substantial performance gains over existing frameworks. With its flexible design and computational efficiency, it serves as a powerful tool for both theoretical studies and practical applications in quantum science.

*We acknowledge Fabrizio Minganti and Luca Gravina for the useful discussions, especially for the dynamical shifted Fock algorithm. We also acknowledge Filippo Ferrari, Lorenzo Fioroni, Po-Chen Kuo, Jhen-Dong Lin, Po-Rong Lai, and Hsiang-Wei Huang for their support and beta testing in the development of the package. We thank all the contributors to the package, as well as the QuTiP team for their support and the useful discussions. In particular, we thank Eric Giguère and Neill Lambert for their insightful discussions on the benchmarks.YTH acknowledges the support of the National Science and Technology Council, Taiwan (NSTC Grant No. 113-2917-I-006-024).YNC acknowledges the support of the National Center for Theoretical Sciences and the National Science and Technology Council, Taiwan (NSTC Grant No. 113-2123-M-006-001 and 114-2112-M-006-015-MY3).V.S. acknowledges the Swiss National Science Foundation through Projects No. 200020_215172, 200021-227992, and 20QU-1_215928.F.N. is supported in part by: the Japan Science and Technology Agency (JST) [via the CREST Quantum Frontiers program Grant No. JPMJCR24I2, the Quantum Leap Flagship Program (Q-LEAP), and the Moonshot R\&D Grant Number JPMJMS2061], and the Office of Naval Research (ONR) Global (via Grant No. N62909-23-1-2074).

Presenters

  • Alberto Mercurio

    • Ecole Polytechnique Fédérale de Lausanne

Authors

  • Alberto Mercurio

    • Ecole Polytechnique Fédérale de Lausanne

  • Yi-Te Huang

    • National Cheng Kung University

  • Li-Xun Cai

    • National Cheng Kung University

  • Yueh-Nan Chen

    • National Cheng Kung University

  • Vincenzo Savona

    • Federal Institute of Technology (EPFL)
    • Ecole Polytechnique Fèdèrale de Lausanne
    • Ecole Polytechnique Federale de Lausanne
    • Ecole Polytechnique Fédérale de Lausanne

  • Franco Nori

    • RIKEN, Saitama, Japan; U. of Michigan, Ann Arbor, USA
    • Quantum Computing Center, RIKEN, Saitama, Japan; Physics Department, The University of Michigan, Ann Arbor, USA
    • RIKEN