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Review Aug 2026

A groupoidal approach to quantum reference frames

We develop the kinematical and operator-algebraic foundations of a groupoid-based relational quantum field theory (RQFT) on curved spacetimes. Indeed, the usual group-based quantum reference frame (QRF) formalism is not directly suited to generic curved Lorentzian backgrounds as global symmetry groups are typically abs...

Samuel Fedida, A. Ibort, Arnau Mas-Dorca · 0 citations

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