Entanglement of annihilation photons
- URL: http://arxiv.org/abs/2210.07623v1
- Date: Fri, 14 Oct 2022 08:21:55 GMT
- Title: Entanglement of annihilation photons
- Authors: Alexander Ivashkin, Dzhonrid Abdurashitov, Alexander Baranov, Fedor
Guber, Sergey Morozov, Sultan Musin, Alexander Strizhak and Igor Tkachev
- Abstract summary: We present the results of a new experimental study of the quantum entanglement of photon pairs produced in positron-electron annihilation at rest.
Despite numerous measurements, there is still no experimental proof of the entanglement of photons.
- Score: 141.5628276096321
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We present the results of a new experimental study of the quantum
entanglement of photon pairs produced in positron-electron annihilation at
rest. The experimental setup includes a system of Compton polarimeters to
measure the Compton scattering of annihilation photons in entangled and
decoherent states. Decoherent states are prepared by pre-scattering of one of
the initial photons prior to measurements in polarimeters. For the first time,
a direct comparison of the polarization correlations of annihilation photons in
the entangled and thus prepared separable states has been carried out. The
angular distributions of scattered photons turned out to be the same in both
quantum states, which is an unexpected discovery for the quantum-entangled
positron emission tomography. Moreover, the correlation function in the Bell's
inequality is also the same for entangled and separable states. It follows
that, despite numerous measurements in a series of experiments, there is still
no experimental proof of the entanglement of annihilation photons. These
results are in line with recent theoretical predictions of an identical Compton
scattering cross-section for entangled and specific mixed separable quantum
states and cast doubt on the universality of the Bell's theorem for testing the
entanglement and nonlocality in quantum theory.
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