QuantumToolbox.jl: An efficient Julia framework for simulating open quantum systems
Quantum 9, 1866 (2025).
https://doi.org/10.22331/q-2025-09-29-1866
We present $tt{QuantumToolbox.jl}$, an open-source Julia package for simulating open quantum systems. Designed with a syntax familiar to users of $tt{QuTiP}$ (Quantum Toolbox in Python), 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. We also show how $tt{QuantumToolbox.jl}$ 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, $tt{QuantumToolbox.jl}$ serves as a powerful tool for both theoretical studies and practical applications in quantum science.
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