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Physical properties of a time machinea National Research Centre ‘Kurchatov Institute’, pl. akad. Kurchatova 1, Moscow, 123182, Russian Federation b Astro Space Centre, Lebedev Physical Institute, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow, 117997, Russian Federation c Niels Bohr Institute, Blegdamsvej 17, Copenhagen, DK-2100, Denmark
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