An Unruh-DeWitt detector interacting with a position-superposed BTZ black hole produces outcome probabilities containing a nonclassical contribution that distinguishes quantum superposition from classical mixtures, arising from singularities in the probed spectrum.
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Electric charge of a Reissner-Nordström black hole enhances decoherence of Dirac entanglement inside the horizon but can temporarily boost accessible entanglement outside, while Hawking radiation transfers correlations to inaccessible regions causing apparent loss for external observers.
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Particle detector in a position-superposed black hole spacetime
An Unruh-DeWitt detector interacting with a position-superposed BTZ black hole produces outcome probabilities containing a nonclassical contribution that distinguishes quantum superposition from classical mixtures, arising from singularities in the probed spectrum.
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Quantum Entanglement in the Dirac Field Quantization around Charged Black Holes
Electric charge of a Reissner-Nordström black hole enhances decoherence of Dirac entanglement inside the horizon but can temporarily boost accessible entanglement outside, while Hawking radiation transfers correlations to inaccessible regions causing apparent loss for external observers.