136 citations · 451 across the 21 of their papers we have counts for
21 papers
Generalized quantum process discrimination problems
Kenji Nakahira, Kentaro Kato
We study a broad class of quantum process discrimination problems that can handle many optimization strategies such as the Bayes, Neyman-Pearson, and unambiguous strategies, where…
Simple upper and lower bounds on the ultimate success probability for discriminating arbitrary finite-dimensional quantum processes
Kenji Nakahira, Kentaro Kato
We consider the problem of discriminating finite-dimensional quantum processes, also called quantum supermaps, that can consist of multiple time steps. Obtaining the ultimate perfo…
Local unambiguous discrimination of symmetric ternary states
Kenji Nakahira, Kentaro Kato, Tsuyoshi Sasaki Usuda
We investigate unambiguous discrimination between given quantum states with a sequential measurement, which is restricted to local measurements and one-way classical communication.…
Optimal discrimination of optical coherent states cannot always be realized by interfering with coherent light, photon counting, and feedback
Kenji Nakahira, Kentaro Kato, Tsuyoshi Sasaki Usuda
It is well known that a minimum error quantum measurement for arbitrary binary optical coherent states can be realized by a receiver that comprises interfering with a coherent refe…
Generalized bipartite quantum state discrimination problems with sequential measurements
Kenji Nakahira, Kentaro Kato, Tsuyoshi Sasaki Usuda
We investigate an optimization problem of finding quantum sequential measurements, which forms a wide class of state discrimination problems with the restriction that only sequenti…
Upper and Lower Bounds on Optimal Success Probability of Quantum State Discrimination with and without Inconclusive Results
Kenji Nakahira, Tsuyoshi Sasaki Usuda, Kentaro Kato
We propose upper and lower bounds on the maximum success probability for discriminating given quantum states. The proposed upper bound is obtained from a suboptimal solution to the…