Experimental phase-covariant cloning of polarization states of single photons
arXiv:quant-ph/0607149 · doi:10.1103/PhysRevA.74.042327
Abstract
The experimental realization of optimal symmetric phase-covariant 1->2 cloning of qubit states is presented. The qubits are represented by polarization states of photons generated by spontaneous parametric down-conversion. The experiment is based on the interference of two photons on a custom-made beam splitter with different splitting ratios for vertical and horizontal polarization components. From the measured data we have estimated the implemented cloning transformation using the maximum-likelihood method. The result shows that the realized transformation is very close to the ideal one and the map fidelity reaches 94%.
5 pages, 4 figures, REVTeX4
References in corpus (16)
- Quantum Cryptography
- Security of quantum key distribution using d-level systems
- Quantum Copying: Beyond the No-Cloning Theorem
- Quantum cloning
- Quantum state estimation
- Phase covariant quantum cloning
- Experimental Quantum Cloning of Single Photons
- Universal Algorithm for Optimal Estimation of Quantum States from Finite Ensembles
- Quantum inference of states and processes
- Two qubit copying machine for economical quantum eavesdropping
- Experimental Quantum Cloning with Prior Partial Information
- Quantum cloning with an optical fiber amplifier
- Experimental realization of optimal asymmetric cloning and telecloning via partial teleportation
- Teleportation scheme implementing contextually the Universal Optimal Quantum Cloning Machine and the Universal Not Gate. Complete experimental realization
- Contextual, Optimal and Universal Realization of the Quantum Cloning Machine and of the NOT gate
- Realization of the 1->3 optimal phase-covariant quantum cloning machine
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- Cloning of arbitrary mirror-symmetric distributions on Bloch sphere: Optimality proof and proposal for practical photonic realization
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