Optical realization of universal quantum cloning

Abstract

Beyond the no-cloning theorem, the universal symmetric quantum cloning machine was first addressed by Buzek and Hillery. Here, we realized the one-to-two qubits Buzek-Hillery cloning machine with linear optical devices. This method relies on the representation of several qubits by a single photon. We showed that, the fidelities between the two output qubits and the original qubit are both 5/6 (which proved to be the optimal fidelity of one-to-two qubits universal cloner) for arbitrary input pure states.

5 Pages, 2 Figures

References in corpus (3)

• Non-maximally entangled states: production, characterization and utilization
• Grover's search algorithm: An optical approach
• Cloning and quantum computation

Cited by in corpus (17)

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• Quantum cloning
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• Quantum Cloning Machines and the Applications
• 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
• Experimental violation of the Leggett-Garg inequality under decoherence
• Universal Quantum Cloning in Cavity QED
• Contextual Realization of the Universal Quantum Cloning Machine and of the Universal-NOT gate by Quantum Injected Optical Parametric Amplification
• NMR Experimental Demonstration of Probabilistic Quantum Cloning
• Quantum partial teleportation as optimal cloning at a distance
• Experimental creation of superposition of unknown photonic quantum states
• Experimental demonstration of entanglement-enabled universal quantum cloning in a circuit
• Upper Bounds for the Number of Quantum Clones under Decoherence
• Scheme for the implementation of optimal cloning of two pairs of orthogonal states
• Sequential quantum cloning under real-life conditions