Superconducting quantum circuits at the surface code threshold for fault tolerance http://www.nature.com/nature/journal/v508/n7497/full/nature13171.html R. Barends, J. Kelly, A. Megrant, A. Veitia, D. Sank, E. Jeffrey, T. C. White, J. Mutus, A. G. Fowler, B. Campbell, Y. Chen, Z. Chen, B. Chiaro, A. Dunsworth, C. Neill, P. O'Malley, P. Roushan, A. Vainsencher, J. Wenner, A. N. Korotkov, A. N. Cleland & John M. Martinis Nature 508(24 April 2014) 500-503 Published online 23 April 2014 They claim to have 5 qubits and do operations on them with "99.92% fidelity." This level of reliability is claimed to be a new record and for the first time surpass threshold necessary to allow "quantum error correction" to function. Although just barely. In practice I don't think it'll work unless they could get a couple more nines.