. . . "We propose two simple implementations of the optimal symmetric 1-->2 phase-covariant cloning machine for qubits. The first scheme is designed for qubits encoded into polarization states of photons and it involves a mixing of two photons on an unbalanced beam splitter. This scheme is probabilistic and the cloning succeeds with the probability 1/3. In the second setup, the qubits are represented by the states of Rydberg atoms and the cloning is accomplished by the resonant interaction of the atoms with a microwave field confined in a high-Q cavity. This latter approach allows for deterministic implementation of the optimal cloning transformation."@en . "67" . . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . . . "15410" . . . "Optical implementations of the optimal phase-covariant quantum cloning machine"@en . "052314-1-7" . "Optical implementations of the optimal phase-covariant quantum cloning machine"@en . "619669" . "1"^^ . . "Fiur\u00E1\u0161ek, Jarom\u00EDr" . "5" . "Optical implementations of the optimal phase-covariant quantum cloning machine" . . "1050-2947" . "RIV/61989592:15410/03:00001349!RIV/2004/MSM/154104/N" . "P(LN00A015), Z(MSM 153100009)" . "0"^^ . "1"^^ . "0"^^ . "1"^^ . . "phase-covariant quantum cloning"@en . . . "We propose two simple implementations of the optimal symmetric 1-->2 phase-covariant cloning machine for qubits. The first scheme is designed for qubits encoded into polarization states of photons and it involves a mixing of two photons on an unbalanced beam splitter. This scheme is probabilistic and the cloning succeeds with the probability 1/3. In the second setup, the qubits are represented by the states of Rydberg atoms and the cloning is accomplished by the resonant interaction of the atoms with a microwave field confined in a high-Q cavity. This latter approach allows for deterministic implementation of the optimal cloning transformation." . "[DB220209268B]" . "RIV/61989592:15410/03:00001349" . "Physical Review A" . "Optical implementations of the optimal phase-covariant quantum cloning machine" . .