Physical review letters
Indefinite Causal Order and Quantum Coordinates.
Anne-Catherine de la Hamette, Viktoria Kabel, Marios Christodoulou, Časlav Brukner
Published: 202510.1103/bnkn-4p3f
Abstract
Classically, the causal order of two timelike separated events A and B is fixed-either A before B or B before A. This is no longer true in quantum theory, where it is possible to encounter superpositions of causal orders. The quantum switch is one of…
Preview only. Read the full abstract at the source