Causal Order Cannot Be An Observable

quant-ph, gr-qc

Submitted: 2026-05-24

Updated: 2026-05-24

Journal ref: Declan Maguire and Fabio Costa 2026 Class. Quantum Grav. 43 195006

DOI: 10.1088/1361-6382/aea696

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Sources

• A scalable quantum gate-based implementation for causal hypothesis testing

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