Measuring the Evolution of Entanglement in Compton Scattering
arXiv:2406.14352 · doi:10.1038/s41598-025-87095-4
Abstract
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.
11 pages, 8 figures
References in corpus (22)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Experimental EPR-Steering of Bell-local States
- Testing spooky action at a distance
- Loopholes in Bell Inequality Tests of Local Realism
- Cosmic Bell Test using Random Measurement Settings from High-Redshift Quasars
- An optomechanical Bell test
- Unscrambling Entanglement through a Complex Medium
- Photon quantum entanglement in the MeV regime and its application in PET imaging
- Witnessing Entanglement In Compton Scattering Processes Via Mutually Unbiased Bases
- Entanglement of annihilation photons
- Experimental investigation of partially entangled states for device-independent randomness generation and self-testing protocols
- Probing entanglement in Compton interactions
- Device independent certification of a quantum delayed choice experiment
- Setup of Compton polarimeters for measuring entangled annihilation photons
- Bell correlations between light and vibration at ambient conditions
- One-photon measurement of two-photon entanglement
- Characterizing mixed state entanglement through single-photon interference
- Kinematic analysis of multiple Compton scattering in quantum-entangled two-photon systems
- Decoherence puzzle in measurements of photons originating from electron-positron annihilation
- Transmission of quantum entanglement through a random medium
- Coherent Backscattering of Entangled Photon Pairs
- Studying the effect of Polarisation in Compton scattering in the undergraduate laboratory
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