2025/04/08 by Suo Tang, Tang, S., Barry M. Dillon +3 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Quantum and Classical Electrodynamics
paper · pdf · doi:10.48550/arxiv.2504.06338
openalex publication_date 2025/04/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the spin correlations between electron-positron pairs created from a photon when it scatters in a high-intensity laser pulse via the nonlinear Breit-Wheeler process. We find that the spin states of the generated electron-positron pair can exhibit strong entanglement, with the degree being sensitive to the photon energy, laser intensity, and the relative polarisation of the photon and laser pulse. Photons with a high degree of polarisation can create strongly entangled pairs, and this entanglement can be maintained in the high-intensity (non-perturbative) regime. We find that if the photons are provided by a Compton source, strongly spin-entangled electron-positron pairs can be generated with technology available today.