Discriminating qubit amplitude damping channels

Abstract

We address the issue of the discrimination between two-qubit amplitude damping channels by exploring several strategies. For the single-shot, we show that the excited state does not always give the optimal input, and that side entanglement assistance has limited benefit. On the contrary, feedback assistance from the environment is more beneficial. For the two-shot, we prove the in-utility of entangled inputs. Then focusing on individual (local) measurements, we find the optimal adaptive strategy.

References in corpus (1)

• Quantum information reclaiming after amplitude damping

Cited by in corpus (9)

• Strict hierarchy between parallel, sequential, and indefinite-causal-order strategies for channel discrimination
• Bounds on amplitude damping channel discrimination
• Optimal quantum strategy for locating Unruh channels
• Discrimination of dephasing channels
• Profitable entanglement for channel discrimination
• Indefinite causal order strategy does not improve the estimation of group action
• Error Probability Mitigation in Quantum Reading using Classical Codes
• Discrimination of bosonic dephasing quantum channels
• Bayesian and Markovian classical feedforward for discriminating qubit channels