Robust concurrent remote entanglement between two superconducting qubits
arXiv:1603.03742 · doi:10.1103/PhysRevX.6.031036
Abstract
Entangling two remote quantum systems which never interact directly is an essential primitive in quantum information science and forms the basis for the modular architecture of quantum computing. When protocols to generate these remote entangled pairs rely on using traveling single photon states as carriers of quantum information, they can be made robust to photon losses, unlike schemes that rely on continuous variable states. However, efficiently detecting single photons is challenging in the domain of superconducting quantum circuits because of the low energy of microwave quanta. Here, we report the realization of a robust form of concurrent remote entanglement based on a novel microwave photon detector implemented in the superconducting circuit quantum electrodynamics (cQED) platform of quantum information. Remote entangled pairs with a fidelity of are generated at Hz. Our experiment opens the way for the implementation of the modular architecture of quantum computation with superconducting qubits.
Main paper: 7 pages, 4 figures; Appendices: 14 pages, 9 figures
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