Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 79: Cavity QED and QED III
Q 79.7: Vortrag
Freitag, 6. März 2026, 16:00–16:15, P 4
Entanglement and pair production in intense electromagnetic fields — Suo Tang1, Barry Dillon2, and •Ben King3 — 1College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao, Shandong 266100, China — 2ISRC, Ulster University, Derry BT48 7JL, UK — 3Centre for Mathematical Sciences, University of Plymouth, PL4 8AA, UK
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 polarization of the photon and laser pulse. Photons with a high degree of polarisation can create strongly entangled pairs even in the intermediate 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.
Keywords: QED; Strong fields; Entanglement