Curator's Take
This research explores a fascinating intersection between quantum information science and fundamental physics by examining how neutrinos behave as quantum information carriers near rotating, charged black holes described by the Kerr-Newman metric. The study reveals that the extreme gravitational and electromagnetic fields around such black holes significantly alter neutrino quantum correlations and entanglement properties compared to simpler black hole models, with the black hole's spin and charge creating distinct oscillation patterns in these quantum effects. While highly theoretical, this work advances our understanding of how quantum information behaves in extreme gravitational environments and could inform future proposals for using neutrinos in quantum communication systems that might one day exploit their unique ability to travel unimpeded through matter and spacetime. The research also contributes to the growing field of relativistic quantum information, where Einstein's gravity meets quantum mechanics in ways that could reveal new physics.
— Mark Eatherly
Summary
Thanks to feeble interactions, neutrinos show special advantages in the field of quantum information (QM). The properties of quantum correlations (QCs) are fundamental for neutrino-based QM. In this paper, we investigate the influence of the Kerr--Newman metric on QCs by varying the metric parameters, namely the mass $M$, angular momentum per unit mass $a$, and charge $Q$. Both radial and non-radial neutrino propagation are considered under the weak-field approximation. The results show that, for inward propagation in the Kerr--Newman metric, the oscillation probabilities and QCs differ significantly from those obtained in the Schwarzschild metric. In the case of radial outward propagation, the angular momentum $a$ increases the oscillation period of the neutrino survival probability $P_{ee}$, entanglement, and nonlocality, whereas the charge $Q$ decreases the corresponding periods. For non-radial propagation, the modulation effects of $M$ and $a$ on the oscillation patterns of both probabilities and QCs become more pronounced. As $M$ increases, the oscillation probability remains within a higher-value range, whereas tripartite entanglement exhibits the opposite trend. Furthermore, our results reveal that, despite differences in their variation ranges, entanglement and coherence exhibit highly consistent oscillation behaviors in both radial and non-radial propagation cases. These findings provide broader quantitative support for the potential use of neutrinos as quantum information resources.