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    Quantum lattice Boltzmann method for several time steps: A local Carleman linearization algorithm

    Antonio David Bastida Zamora*, Ljubomir Budinski†, and Valtteri Lahtinen‡

    Pierre Sagaut

    • Quanscient Oy, Peltokatu 34 B, 33100 Tampere, Finland

    • *Also at Aix-Marseille University, Marseille, France.
    • †Also at Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia.
    • ‡Also at School of Engineering Science, Lappeenranta–Lahti University of Technology, Finland.

    Phys. Rev. E 113, 035307 – Published 12 March, 2026

    DOI: https://doi.org/10.1103/kbx3-c35d

    Abstract

    This article presents an encoding for the quantum Lattice Boltzmann method algorithm using Carleman linearization. In contrast to previous articles [C. Sanavio et al., AVS Quantum Sci. 6, 023802 (2024); Phys. Fluids 37, 037123 (2025)], the encoding used allows for local collision rules while keeping a higher probability to obtain the correct result, which is of the order of 10−2. The algorithm scales as O[log22(N)+Q3] at each time step with N the number of lattice sites of the two-dimensional lattice and Q the number of channels with a constant number of qubits when using dynamical circuits.

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