Simulating the quantum switch with quantum circuits is computationally hard
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-025-64996-6
Abstract: Higher-order transformations acting on input quantum channels in an indefinite causal order—such as the quantum switch—cannot be described by quantum circuits using the same number of calls to the input channels. A natural question is… read more here.
Keywords: quantum circuits; quantum switch; indefinite causal; quantum ... See more keywords
Symmetries in Teleportation Assisted by N-Channels under Indefinite Causal Order and Post-Measurement
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DOI: 10.3390/sym12111904
Abstract: Quantum teleportation has had notorious advances in the last decade, being successfully deployed in the experimental domain. In other terrains, the understanding of indefinite causal order has demonstrated a valuable enhancement in quantum communication to… read more here.
Keywords: teleportation; indefinite causal; causal order; teleportation assisted ... See more keywords
Symmetries of Quantum Fisher Information as Parameter Estimator for Pauli Channels under Indefinite Causal Order
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DOI: 10.3390/sym14091813
Abstract: Quantum Fisher Information is considered in Quantum Information literature as the main resource to determine a bound in the parametric characterization problem of a quantum channel by means of probe states. The parameters characterizing a… read more here.
Keywords: information; quantum; pauli channels; quantum fisher ... See more keywords