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Computing the distance between quantum channels: Usefulness of the Fano representation

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arxiv 1004.4110 v1 pith:IXFH4FTT submitted 2010-04-23 quant-ph

classification quant-ph
keywords quantumchannelsnormalgorithmdiamonddistancefanomeasures
verification ladder T0 review T1 audit T2 compute T3 formal
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The diamond norm measures the distance between two quantum channels. From an operational vewpoint, this norm measures how well we can distinguish between two channels by applying them to input states of arbitrarily large dimensions. In this paper, we show that the diamond norm can be conveniently and in a physically transparent way computed by means of a Monte-Carlo algorithm based on the Fano representation of quantum states and quantum operations. The effectiveness of this algorithm is illustrated for several single-qubit quantum channels.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Noise-Aware Mixed-State Quantum Computation via Parameterized Quantum Channels

    quant-ph 2025-02 conditional novelty 4.0 of 10

    The paper frames parameterized quantum channels as a noise-aware computing resource and shows that optimizing a mixture of two noisy CNOT implementations improves channel fidelity in a simple emulator test.

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