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3 papers
A refined Frauchiger--Renner paradox based on strong contextuality
Laurens Walleghem, Rui Soares Barbosa, Matthew F. Pusey +1
The Frauchiger--Renner paradox derives an inconsistency when quantum theory is used to describe the use of itself, by means of a scenario where agents model other agents quantumly…
Measuring unitary invariants with the quantum switch
Pedro C. Azado, Rafael Wagner, Rui S. Barbosa +1
Bargmann invariants, multivariate traces of states, completely characterize any unitary-invariant property of a set of states. Unitary invariants enable the description of quantum…
Matchgate hierarchy: A Clifford-like hierarchy for deterministic gate teleportation in matchgate circuits
Angelos Bampounis, Rui Soares Barbosa, Nadish de Silva
The Clifford hierarchy, introduced by Gottesman and Chuang in 1999, is an increasing sequence of sets of quantum gates crucial to the gate teleportation model for fault-tolerant qu…