  Teleportation of quantum gates is a critical step for implementation of
quantum networking and teleportation-based models of quantum computation. We
report an experimental demonstration of teleportation of the prototypical
quantum controlled-NOT (CNOT) gate. Assisted with linear optical manipulations,
photon entanglement produced from parametric down conversion, and coincidence
measurements, we teleport the quantum CNOT gate from acting on local qubits to
acting on remote qubits. The quality of the quantum gate teleportation is
characterized through the method of quantum process tomography, with an average
fidelity of 0.84 demonstrated for the teleported gate.
