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arXiv · 2504.06338

Entanglement and pair production in intense electromagnetic fields

S. Tang·B. M. Dillon·B. King
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Abstract

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.

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S. Tang, B. M. Dillon, B. King. 2025-04-08. Entanglement and pair production in intense electromagnetic fields. https://arxiv.org/abs/2504.06338

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