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<p>We address the issue of multi-shot discrimination between two qubit channels by invoking a simple adaptive protocol that employs Helstrom measurement at each step and classical information feedforward, beside separable inputs. We contrast the performance of Bayesian and Markovian strategies. We show that the former is only slightly advantageous and for a limited parameters’ region.</p>

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Bayesian and Markovian classical feedforward for discriminating qubit channels

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Milajiguli Rexiti,
  • Stefano Mancini

摘要

We address the issue of multi-shot discrimination between two qubit channels by invoking a simple adaptive protocol that employs Helstrom measurement at each step and classical information feedforward, beside separable inputs. We contrast the performance of Bayesian and Markovian strategies. We show that the former is only slightly advantageous and for a limited parameters’ region.