First experimental implementation of a device-independent inequality violation for indefinite causal order, with measured value 1.8328 ± 0.0045 against bound 1.75.
Frey, Indefinite causal order aids quantum depolar- izing channel identification, Quantum Information Pro- cessing 18, 96 (2019)
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Toward an Experimental Device-Independent Verification of Indefinite Causal Order
First experimental implementation of a device-independent inequality violation for indefinite causal order, with measured value 1.8328 ± 0.0045 against bound 1.75.