The paper characterizes families of d-dimensional unitaries and qubit Pauli channels that admit masking through bipartite broadcasting channels, with an iff condition that a qubit channel masks against the identity precisely when it is unital and possesses a pure-state fixed point.
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Generalized robustness of quantum channel incompatibility lower-bounds the total error of any approximate joint realization, unifying measurement uncertainty and no-disturbance principles.
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Quantum Channel Masking
The paper characterizes families of d-dimensional unitaries and qubit Pauli channels that admit masking through bipartite broadcasting channels, with an iff condition that a qubit channel masks against the identity precisely when it is unital and possesses a pure-state fixed point.
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Joint Realizability Tradeoffs Bounded by Quantum Channel Incompatibility
Generalized robustness of quantum channel incompatibility lower-bounds the total error of any approximate joint realization, unifying measurement uncertainty and no-disturbance principles.