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quant-ph2026
Witnessing the architecture of quantum circuits
Raphaël Mothe, Otfried Gühne
Determining whether a target unitary can be implemented within a prescribed quantum circuit architecture is a fundamental problem in quantum information, with direct implications f…
quant-ph2025
Correlations and quantum circuits with dynamical causal order
Raphaël Mothe, Raphaël Mothe, Alastair A. Abbott +1
Requiring that the causal structure between different parties is well-defined imposes constraints on the correlations they can establish, which define so-called causal correlations…
quant-ph2024
Reassessing the advantage of indefinite causal orders for quantum metrology
Raphaël Mothe, Cyril Branciard, Alastair A. Abbott
The quantum switch, the canonical example of a process with indefinite causal order, has been claimed to provide various advantages over processes with definite causal orders for s…