Abstract
Necessary and sufficient conditions of an optimum pair of signals for given decision operators are given. These conditions show what kind of signals are desired for the output of the unitary transformation in a received quantum state control system by unitary process in order to achieve the Helstrom’s bound. We show pictures of optimum signals which the conditions imply. Then we consider as examples two of received quantum state control systems by unitary process.
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Sasaki-Usuda, T., Hata, M. (1997). On the Realization of Received Quantum State Control by Unitary Transformation. In: Hirota, O., Holevo, A.S., Caves, C.M. (eds) Quantum Communication, Computing, and Measurement. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-5923-8_14
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DOI: https://doi.org/10.1007/978-1-4615-5923-8_14
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