Preserving quantum information in f(Q) non-metric gravity cosmology

Capozziello S. Lapponi A. Luongo O. Mancini S.
October 2024 Springer Nature

European Physical Journal C
2024 #84 Issue 10

The effects of cosmological expansion on quantum bosonic states are investigated, using quantum information theory. In particular, a generic Bogoliubov transformation of bosonic field modes is considered and the state change on a single mode is regarded as the effect of a quantum channel. Properties and capacities of this channel are thus explored in the framework of f(Q) non-metric gravity. The reason is that non-metric gravity can be considered under the standard of gauge theories with all the advantages of such a formulation. As immediate result, we obtain that the information on a single-mode state appears better preserved, whenever the number of particles produced by the cosmological expansion is small. Specifically, we investigate a power law f(Q) model, leaving unaltered the effective gravitational coupling, and minimise the corresponding particle production. We thus show how to optimise the preservation of classical and quantum information, stored in bosonic mode states in the remote past. Finally, we compare our findings with those obtained in General Relativity.

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Università degli Studi di Napoli “Federico II”, Dipartimento di Fisica “Ettore Pancini”, Complesso Universitario di Monte S. Angelo, Via Cinthia Edificio 6, Naples, 80126, Italy
Scuola Superiore Meridionale, Largo San Marcellino 10, Naples, 80138, Italy
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Complesso Universitario di Monte S. Angelo, Via Cinthia Edificio 6, Naples, 80126, Italy
Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
School of Science and Technology, University of Camerino, Via Madonna delle Carceri 9, Camerino, 62032, Italy
SUNY Polytechnic Institute, Utica, 13502, NY, United States
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Perugia, Via A. Pascoli, Perugia, 06123, Italy
INAF-Osservatorio Astronomico di Brera, Milan, Italy

Università degli Studi di Napoli “Federico II”
Scuola Superiore Meridionale
Istituto Nazionale di Fisica Nucleare
Al-Farabi Kazakh National University
School of Science and Technology
SUNY Polytechnic Institute
Istituto Nazionale di Fisica Nucleare (INFN)
INAF-Osservatorio Astronomico di Brera

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