Derives lower and upper bounds on maximum average success probability for unambiguous change-point discrimination of quantum channels, with exact analytical expression when channels are unitary.
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Quantum instrument errors are represented by outcome-specific d²×d² superoperators, but the joint quantum-classical nature requires careful interpretation beyond standard process matrices.
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Unambiguous discrimination of the change point for quantum channels
Derives lower and upper bounds on maximum average success probability for unambiguous change-point discrimination of quantum channels, with exact analytical expression when channels are unitary.
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Understanding Quantum Instruments
Quantum instrument errors are represented by outcome-specific d²×d² superoperators, but the joint quantum-classical nature requires careful interpretation beyond standard process matrices.