Optical realization of universal quantum cloning

Details Optical realization of universal quantum cloning Optical realization of universal quantum cloning

2000-06-07

arxiv.org/abs/quant-ph/0006032v2

Phys. Rev. A 64, 012315 (2001)

Physics

Quantum Physics

5 Pages, 2 Figures

Scientific paper

10.1103/PhysRevA.64.012315

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.

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