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TASEPy: A Python-based package to iteratively solve the inhomogeneous exclusion process

Luca Ciandrini, Richmond L. Crisostomo, Juraj Szavits-Nossan

SciPost Phys. Codebases 22 (2023) · published 13 December 2023

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The totally asymmetric simple exclusion process (TASEP) is a paradigmatic lattice model for one-dimensional particle transport subject to excluded-volume interactions. Solving the inhomogeneous TASEP in which particles' hopping rate vary across the lattice is a long-standing problem. In recent years, a power series approximation (PSA) has been developed to tackle this problem, however no computer algorithm currently exists that implements this approximation. This paper addresses this issue by providing a Python-based package TASEPy that finds the steady state solution of the inhomogeneous TASEP for any set of hopping rates using the PSA truncated at a user-defined order.

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