Optical implementations of the optimal phase-covariant quantum cloning machine

Journal Article · Thu May 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.052314· OSTI ID:20636363

Fiurasek, Jaromir ^[1]

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1. Department of Optics, Palacky University, 17. listopadu 50, 77200 Olomouc (Czech Republic)

We propose two simple implementations of the optimal symmetric 1{yields}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.

• OSTI ID: 20636363
• Journal Information: Physical Review. A, Vol. 67, Issue 5; Other Information: DOI: 10.1103/PhysRevA.67.052314; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BEAM SPLITTING
DATA TRANSMISSION
IMPLEMENTATION
MIXING
OPTICS
PHOTONS
POLARIZATION
PROBABILISTIC ESTIMATION
PROBABILITY
QUANTUM MECHANICS
RYDBERG STATES
TRANSFORMATIONS