Benchmarking a Teleportation Protocol realized in Superconducting Circuits

Details Benchmarking a Teleportation Protocol realized in Superconducting Circuits Benchmarking a Teleportation Protocol realized in Superconducting Circuits

2011-07-24

arxiv.org/abs/1107.4774v1

Phys. Rev. Lett. 108, 040502 (2012)

Physics

Quantum Physics

4 pages, 4 figures

Scientific paper

Teleportation of a quantum state may be used for distributing entanglement between distant qubits in quantum communication and for quantum computation. Here we demonstrate the implementation of a teleportation protocol, up to the single-shot measurement step, with superconducting qubits coupled to a microwave resonator. Using full quantum state tomography and evaluating an entanglement witness, we show that the protocol generates a genuine tripartite entangled state of all three-qubits. Calculating the projection of the measured density matrix onto the basis states of two qubits allows us to reconstruct the teleported state. Repeating this procedure for a complete set of input states we find an average output state fidelity of 88%.

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