Quantum entanglement in Plebański-Demiański spacetimes

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Abstract

For an Einstein-Podolsky-Rosen pair of spin-1/2 particles in circular orbits in a general axially symmetric spacetime, the spin precession angle is obtained. Hovering observers are introduced for ensuring fixed reference frames to perform suitable reliable measurements. Frame-dragging of spinning holes is explicitly incorporated relative to hovering observers. The spin-singlet state is found to be mixed with the spin-triplet by acceleration and gravity effects, which deteriorate the perfect anti-correlation of an entangled pair of spins measured by hovering observers. Finally, an algorithm to calculate spin precession for a general axially symmetric spacetime is proposed. This algorithm is applied to study the complete list of expanding and twisting Type-D Plebański-Demiański black holes and their descendent limiting solutions with lower parameters. © 2013 IOP Publishing Ltd.

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García-Compeán, H., & Robledo-Padilla, F. (2013). Quantum entanglement in Plebański-Demiański spacetimes. Classical and Quantum Gravity, 30(23). https://doi.org/10.1088/0264-9381/30/23/235012

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