"RIV/61989592:15310/08:00005565" . "1"^^ . "1"^^ . . "2"^^ . . "A linear optical probabilistic scheme for the optimal cloning of a pair of orthogonally polarized photons is devised, based on single- and two-photon interferences. It consists in a partial symmetrization device realized with a modified unbalanced Mach-Zehnder interferometer, followed by two balanced beam splitters where the Hong-Ou-Mandel photon bunching occurs. This scheme has the advantage that it enables quantum cloning without the need for stimulated amplification in a nonlinear medium. It can also be modified so to make an optical two-qubit partial SWAP gate, thereby providing a potentially useful tool to linear optics quantum computing."@en . . "Kvantov\u00E9 kop\u00EDrov\u00E1n\u00ED p\u00E1r\u016F ortogon\u00E1ln\u011B polarizovan\u00FDch foton\u016F pomoc\u00ED line\u00E1rn\u00ED optiky"@cs . . . . "Physical Review A" . . . "Kvantov\u00E9 kop\u00EDrov\u00E1n\u00ED p\u00E1r\u016F ortogon\u00E1ln\u011B polarizovan\u00FDch foton\u016F pomoc\u00ED line\u00E1rn\u00ED optiky"@cs . "A linear optical probabilistic scheme for the optimal cloning of a pair of orthogonally polarized photons is devised, based on single- and two-photon interferences. It consists in a partial symmetrization device realized with a modified unbalanced Mach-Zehnder interferometer, followed by two balanced beam splitters where the Hong-Ou-Mandel photon bunching occurs. This scheme has the advantage that it enables quantum cloning without the need for stimulated amplification in a nonlinear medium. It can also be modified so to make an optical two-qubit partial SWAP gate, thereby providing a potentially useful tool to linear optics quantum computing." . . "Cerf, Nicolas" . "Je navr\u017Eeno sch\u00E9ma pro optim\u00E1ln\u00ED kop\u00EDrov\u00E1n\u00ED p\u00E1r\u016F ortogon\u00E1ln\u011B polarizovan\u00FDch foton\u016F pomoc\u00ED kombinace jedno- a dvou-fotonov\u00E9 interference. J\u00E1dro sch\u00E9matu p\u0159edstavuje za\u0159\u00EDzen\u00ED pro \u010D\u00E1ste\u010Dnou symetrizaci polariza\u010Dn\u00EDho stavu dvou foton\u016F tvo\u0159en\u00E9 modifikovan\u00FDm nevyv\u00E1\u017Een\u00FDm Machov\u00FDm-Zehnderov\u00FDm interferometrem. Po \u010D\u00E1ste\u010Dn\u00E9 symetrizaci interferuj\u00ED klonovan\u00E9 fotony s dal\u0161\u00EDmi dv\u011Bma pomocn\u00FDmi fotony na dvou d\u011Bli\u010D\u00EDch svazku, kde doch\u00E1z\u00ED k shlukov\u00E1n\u00ED foton\u016F. V\u00FDznamnou v\u00FDhodou navr\u017Een\u00E9ho sch\u00E9matu je, \u017Ee umo\u017E\u0148uje realizovat optim\u00E1ln\u00ED kvantov\u00E9 kop\u00EDrov\u00E1n\u00ED bez pou\u017Eit\u00ED stimulovan\u00E9ho zes\u00EDlen\u00ED foton\u016F v neline\u00E1rn\u00EDm m\u00E9diu. Navr\u017Een\u00E9 sch\u00E9ma m\u016F\u017Ee b\u00FDt rovn\u011B\u017E modifikov\u00E1no tak, aby realizovalo \u010D\u00E1ste\u010Dnou transpozici dvou kvantov\u00FDch bit\u016F. Toto sch\u00E9ma tak m\u016F\u017Ee naj\u00EDt \u0159adu aplikac\u00ED v kvantov\u00E9m po\u010D\u00EDt\u00E1n\u00ED s line\u00E1rn\u00ED optikou."@cs . . "Quantum cloning of a pair of orthogonally polarized photons with linear optics" . "[DC255A750586]" . "Quantum cloning of a pair of orthogonally polarized photons with linear optics"@en . "1050-2947" . "Quantum cloning of a pair of orthogonally polarized photons with linear optics"@en . . . "Fiur\u00E1\u0161ek, Jarom\u00EDr" . "Quantum cloning of a pair of orthogonally polarized photons with linear optics" . "77" . . . . "P(LC06007), Z(MSM6198959213)" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . "391264" . . . "RIV/61989592:15310/08:00005565!RIV09-MSM-15310___" . "5" . "quantum cloning; two-photon states; partial symmetrization; linear optics; multiphoton interference"@en . "15310" .