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 polarization of the photon and laser pulse. Photons with a high degree of polarization can create strongly entangled pairs even in the intermediate intensity (nonperturbative) 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.
| Original language | English |
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| Pages (from-to) | 056032-1 - 056032-18 |
| Number of pages | 18 |
| Journal | Physical Review D |
| Volume | 112 |
| Issue number | 5 |
| Early online date | 26 Sept 2025 |
| DOIs | |
| Publication status | Published (in print/issue) - 26 Sept 2025 |
Data Access Statement
The data that support the findings of this article are not publicly available. The data are available from the authors upon reasonable request.Funding
S. T. acknowledges support from the Shandong Provincial Natural Science Foundation, Grant No. ZR2021QA088.