Collider scattering processes such as electron-positron annihilation to muon pairs can be represented as quantum circuits with unitary and non-unitary components.
Entanglement and scattering in quantum electrodynamics: S matrix information from an entangled specta- tor particle
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In perturbative relativistic 2→2 scattering the concurrence of the traced-out qubit density matrix depends at leading order on the real part of the inelastic forward amplitude.
The paper derives regularized density matrix expressions and polarization correlations for double Compton scattering of entangled photons by enforcing unitarity at tree level, proposing a novel cross-section definition and drawing an analogy to Young's diffraction experiment.
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A collider as a quantum computer
Collider scattering processes such as electron-positron annihilation to muon pairs can be represented as quantum circuits with unitary and non-unitary components.
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Qubit entanglement from forward scattering
In perturbative relativistic 2→2 scattering the concurrence of the traced-out qubit density matrix depends at leading order on the real part of the inelastic forward amplitude.
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Regularized Compton double scattering via unitarity
The paper derives regularized density matrix expressions and polarization correlations for double Compton scattering of entangled photons by enforcing unitarity at tree level, proposing a novel cross-section definition and drawing an analogy to Young's diffraction experiment.