arxiv:2107.06147

QTRAJ 1.0: A Lindblad equation solver for heavy-quarkonium dynamics

Published on Jul 13, 2021

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Abstract

QTraj is an open-source package that simulates heavy-quarkonium dynamics using the quantum trajectories algorithm and 3+1D hydrodynamics input.

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We introduce an open-source package called QTraj that solves the Lindblad equation for heavy-quarkonium dynamics using the quantum trajectories algorithm. The package allows users to simulate the suppression of heavy-quarkonium states using externally-supplied input from 3+1D hydrodynamics simulations. The code uses a split-step pseudo-spectral method for updating the wave-function between jumps, which is implemented using the open-source multi-threaded FFTW3 package. This allows one to have manifestly unitary evolution when using real-valued potentials. In this paper, we provide detailed documentation of QTraj 1.0, installation instructions, and present various tests and benchmarks of the code.

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