Approximate Quantum Cloning with Nuclear Magnetic Resonance
Holly K. Cummins, C.M.S. Jones, Alistair Furze, Nicholas F. Soffe, Michele Mosca, Josephine M. Peach, Jonathan A. Jones · Physical Review Letters · 2002
Here we describe a nuclear magnetic resonance (NMR) experiment that uses a three qubit NMR device to implement the one-to-two approximate quantum cloning network of Buzek et al. [Phys. Rev. A 56, 3446 (1997)]. As expected the experimental results indicate that the network clones all input states with similar fidelities, but as a result of decoherence and incoherent evolution arising from B(1) inhomogeneity the total fidelity achieved does not exceed the measurement bound.