Theory of Deterministic Entanglement Generation between Remote Superconducting Atoms
K. Koshino, K. Inomata, Z. R. Lin, Y. Tokunaga, T. Yamamoto, Y. Nakamura
DOI 10.1103/PhysRevApplied.7.064006 · Physical Review Applied
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Abstract
Entangling remote qubits is an essential technological element in the distributed quantum information processing. Here, we propose a deterministic scheme to generate maximal entanglement between remote superconducting atoms, using a propagating microwave photon as a flying qubit. The building block of this scheme is an atom-photon two-qubit gate, in which the photon qubit is encoded on its carrier frequencies. The gate operation completes deterministically upon reflection of a photon, and the gate type can be continuously varied (including swap, SWAP, and identity gates) through in situ control of the drive field. Applying such atom-photon gates sequentially, we can perform various gate operations between remote superconducting atoms.
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