26-30 November 2018
Europe/Vienna timezone

Emergent Entanglement in the 2-Gamma and 3-Gamma Decay of Positronium

27 Nov 2018, 13:55


Austrian Academy of Sciences, Dr.-Ignaz-Seipel-Platz 2, 1010 Vienna, AUSTRIA
Invited Talk [2] Emergence of symmetries from entanglement Emergence of symmetries from entanglement


Dr Beatrix C. Hiesmayr (University of Vienna)


The electron-positron annihilation into two photons is a standard technology in medicine to observe e.g. metabolic processes in human bodies. A new tomograph, the J-PET, will provide the possibility to observe not only direct positron-electron annihilations but also the 2-photon and 3-photons decay of positronium atoms. Moreover, the polarisation properties of these photons may become feasible over Compton scattering processes. This talk discusses the theoretically predicted entanglement of the two- and the three-photon states and outlines how it can be detected. In particular the three-photon state exhibits an interesting entanglement, namely it is genuinely multipartite entangled, a type of entanglement involving all degrees of freedom. Surprisingly, even if all spin eigenstates mix, a situation expected in the human body, still the entanglement due to symmetrization symmetries survives. Once this bipartite or/and multipartite entanglement can be experimentally observed novel biological indicators, e.g. relating cancer detection and entanglement in the positronium decay, may become a standard technology for doctors.
[1] B.C. Hiesmayr and P. Moskal , Witnessing Entanglement In Compton Scattering Processes Via Mutually Unbiased Bases, arXiv:1807.04934
[2] B.C. Hiesmayr and P. Moskal , Genuine Multipartite Entanglement in the 3-Photon Decay of Positronium, Scientific Reports 7: 15349 (2017).

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Dr Beatrix C. Hiesmayr (University of Vienna)

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