Can the quantum switch be deterministically simulated?

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Exponential separation in quantum query complexity of the quantum switch with respect to simulations with standard quantum circuits

H Kristjánsson, T Odake, S Yoshida, P Taranto… - arxiv preprint arxiv …, 2024 - arxiv.org
Quantum theory is consistent with a computational model permitting black-box operations to
be applied in an indefinite causal order, going beyond the standard circuit model of …
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