Superconducting flux qubits: CNOT gate. Horizontal axis represents control qubit rotation; ordinate of colour figures sets number of CNOT gates executed (a) (b) Control qubit input state preparation, (c) (d) target qubit state after CNOT pulse. Plantenberg et al. Nature, 15 June 2007.
CNOT gate demonstrated in superconducting flux qubits Kavli|Delft In Nature 447, 836-839 and concurrent reviews in HPCwire, Scientific American, TU Delft [1] [2] (in Dutch), Plantenberg et al. demonstrate selective execution of controlled-NOT quantum logic gates in a pair of coupled flux qubits. "Complemented with longer coherence times and optimized detector visibility, the presented gates enable experiments on two-qubit quantum algorithms and solid-state qubit entanglement using the four Bell states. This scheme, combined with controllable coupling, forms an attractive and generic approach to implementation of solid-state quantum computing." Detailed analysis of controlled rotations, experimental data and conditional spectroscopy are available at doi:10.1028/nature05896.
Teleportation of massive particles without shared entanglement Queensland|Canberra arXiv quant-ph 0706.0062. " We propose a method for quantum state transfer from one atom laser beam to another via an intermediate optical field, using Raman incoupling and outcoupling techniques. Our proposal utilises existing experimental technologies to teleport macroscopic matter waves over potentially large distances without shared entanglement. "
