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A Genuinely General Relativistic Route to Gravitationally Mediated Entanglement

Most proposals to witness the quantum nature of gravity in the low-energy regime rely on the Newtonian potential: a c-independent interaction that survives the c → ∞ limit and therefore carries no direct imprint of the relativistic structure of gravity.

Monday 08.06.2026 03:06 pm
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In this talk, I will discuss a protocol in which entanglement is instead mediated by the Lense-Thirring frame dragging effect, a gravitomagnetic interaction sourced by angular momentum rather than mass and with no counterpart in Newtonian gravity. By representing the sources in angular-momentum eigenstates, I will show that entanglement can be generated between rotational degrees of freedom, with appreciable correlations arising even without spatially superposed mass states. I will argue that the possibility of rotating the spheres at high angular velocities can compensate for the smallness of the gravitomagnetic coupling, enabling entangling rates comparable to those of Newtonian schemes. I will conclude by discussing open questions and conceptual avenues opened by frame dragging-mediated entanglement. 

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Speaker: Trinidad Lantaño (Ulm University) 

Time: 15:00