The equivalence principle and inertial-gravitational decoherence

2022-10-04 15:00 - 16:00
14 - 15 IV piano St. 9
Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Sao Paulo, Brazil
Area di Ricerca
Teoria dei Campi, Gravitazione ed Astrofisica

Since the earliest paper on the topic by Matvei Bronstein [1] it was clear that the equivalence principle is incompatible with the usual separation between a ``quantum system`` and a ``classical detector``, namely the fact that the charge/mass ratio is ``small``. A modern treatment, based on open quantum systems and path integrals, can however directly address this issue, and systematically calculate corrections both in the case of a light recoiling detector and in the case of a heavy gravitating one. We illustrate this for an interferometric setup of the type of [2,3] and show that for all parameters a ``semiclassical limit``, where one can measure a phase shift due to gravitational attraction between quantum objects, is unlikely. [1] M. Bronstein, Gen.Rel.Grav. 44 (2012) 267-283 Original: Matvei Bronstein, Quantentheorie schwacher Gravitationsfelder, Physikalische Zeitschrift der Sowjetunion, Band 9, Heft 2?3, pp. 140?157 (1936). [2] S.Bose et. al., arXiv:1707.06050 (PRL) [3] C. Marletto,V.Vedral arXiv:1707.06036 (PRL)


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