Measuring the evolution of entanglement in Compton scattering.

• Tác giả: Dzhonrid Abdurashitov, Alexander Baranov, Fedor Guber, Alexander Ivashkin, Sultan Musin, Alexander Strizhak, Igor Tkachev
• Ngôn ngữ: eng
• Ký hiệu phân loại: 553.3 Iron
• Thông tin xuất bản: England : Scientific reports , 2025
• Bộ sưu tập: NCBI
• ID: 469236

Tóm tắt

The evolution of the entanglement measure during Compton scattering is studied. Our analytical results show that the corresponding measure coincides with the concurrence of the two-qubit state arising after scattering. The state never collapses to a separable one, contrary to what was previously assumed. The behavior of quantum entanglement during scattering is identical to the behavior of initially classically correlated photons up to a constant factor equal to two. This is consistent with local quantum field theory, and "spooky action at a distance" is not required to explain the change in state of nonlocally entangled qubits during the measurement of one of them. Our dedicated experiment with annihilation photons confirms these results and explains the "Puzzle of Decoherence" observed recently.