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quant-ph2025
Foundations of Relational Quantum Field Theory I: Scalars
Samuel Fedida, Jan Głowacki
We develop foundations for a relational approach to quantum field theory (RQFT) based on the operational quantum reference frames (QRFs) framework considered in a relativistic sett…
quant-ph2025
Einstein causality of quantum measurements in the Tomonaga-Schwinger picture
Samuel Fedida
We investigate a generalisation to Lüders' rule à la Aharonov-Albert in those globally hyperbolic spacetimes which allow unitarily equivalent Hilbert spaces to be defined along Cau…