Superchannels and quantum combs

What is the optimal quasiprobability overhead of implementing the complex conjugate of an unknown quantum channel from \(n\) queries?

• Quantum algorithm
• Quantum Resource Theory
• Channel simulation
• Superchannels and quantum combs
• Quantum error mitigation

Can a fully general adaptive strategy attain a larger Stein exponent than every nested-adaptive strategy for discriminating two quantum superchannels?

• Quantum metrology
• Channel discrimination
• Quantum hypothesis testing
• Superchannels and quantum combs

Does amortization collapse for the max-relative entropy and geometric Rényi divergence of arbitrary finite-dimensional quantum superchannels?

• Quantum metrology
• Quantum Communication
• Channel discrimination
• Quantum relative entropy
• Superchannels and quantum combs

Can nested-adaptive strategies improve the Stein exponent for discriminating two finite-dimensional quantum superchannels?

• Quantum metrology
• Channel discrimination
• Quantum hypothesis testing
• Superchannels and quantum combs