Abstract
We investigate bipartite quantum correlations in the presence of the four-dimensional Kerr–Newman black hole using the negativity as a measure for the entanglement. We assume Alice and Rob initially share a maximally entangled state, and then Rob accelerates toward the event horizon \(h_{+}\). We find that when Rob accelerates uniformly toward the external horizon, the entanglement degrades for the Alice–Rob system and this degradation increases as Rob gets closer to the horizon. It is found that for the case Alice–AntiRob, no creation of quantum correlation occurs. Finally, we investigate the bipartite entanglement using an alternative entanglement measure, namely generalized concurrence, and we show that the results are in consistent with those obtained by negativity.
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Asghari, M., Pedram, P. & Espoukeh, P. Entanglement degradation in the presence of the Kerr–Newman black hole. Quantum Inf Process 17, 115 (2018). https://doi.org/10.1007/s11128-018-1873-2
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DOI: https://doi.org/10.1007/s11128-018-1873-2