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QEDtool: a Python package for numerical quantum information in quantum electrodynamics
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DOI：10.1016/j.cpc.2026.110127.png)
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Abstract
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This is the manual of the first version of QEDtool, an object-oriented Python package that performs numerical quantum electrodynamics calculations, with focus on full state reconstruction in the internal degrees of freedom, correlations and entanglement quantification. Our package rests on the evaluation of Feynman amplitudes in the momentum-helicity basis within a relativistic framework. Users can specify both pure and mixed initial scattering states in polarization space. From the specified initial state and Feynman amplitudes, QEDtool reconstructs correlations that fully characterize the quantum polarization and entanglement within the final state. These quantities can be expressed in any inertial frame by arbitrary, built-in Lorentz transformations.
Keywords:
quantum electrodynamics
quantum information
Lorentz transformations
scattering theory
quantum entanglement
quantum field theory
polarization degrees of freedom
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