SEDLAK, Michal, Mário ZIMAN, Vladimír BUŽEK a Mark HILLERY. Unambiguous comparison of ensembles of quantum states. Physical Review A (Atomic, Molecular, and Optical Physics). 2008, roč. 77, č. 1, s. 042304-42311. ISSN 1050-2947. |
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@article{769991, author = {Sedlak, Michal and Ziman, Mário and Bužek, Vladimír and Hillery, Mark}, article_number = {1}, keywords = {quantum information; quantum estimation}, language = {eng}, issn = {1050-2947}, journal = {Physical Review A (Atomic, Molecular, and Optical Physics)}, title = {Unambiguous comparison of ensembles of quantum states}, volume = {77}, year = {2008} }
TY - JOUR ID - 769991 AU - Sedlak, Michal - Ziman, Mário - Bužek, Vladimír - Hillery, Mark PY - 2008 TI - Unambiguous comparison of ensembles of quantum states JF - Physical Review A (Atomic, Molecular, and Optical Physics) VL - 77 IS - 1 SP - 042304 EP - 042304 SN - 10502947 KW - quantum information KW - quantum estimation N2 - We present a solution of the problem of the optimal unambiguous comparison of two ensembles of unknown quantum states (psi_1)^k and (psi_2)^l. We consider two cases: 1) The two unknown states psi_1 and psi_2 are arbitrary states of qudits. 2) Alternatively, they are coherent states of a harmonic oscillator. For the case of coherent states we propose a simple experimental realization of the optimal "comparison" machine composed of a finite number of beam-splitters and a single photodetector. ER -
SEDLAK, Michal, Mário ZIMAN, Vladimír BUŽEK a Mark HILLERY. Unambiguous comparison of ensembles of quantum states. \textit{Physical Review A (Atomic, Molecular, and Optical Physics)}. 2008, roč.~77, č.~1, s.~042304-42311. ISSN~1050-2947.
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