Hybrid quantum circuit with a superconducting qubit coupled to a spin ensemble

We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy centers in a diamond crystal via a frequency-tunable su...

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Bibliographic Details
Published in:Physical review letters 2011-11, Vol.107 (22), p.220501-220501, Article 220501
Main Authors: Kubo, Y, Grezes, C, Dewes, A, Umeda, T, Isoya, J, Sumiya, H, Morishita, N, Abe, H, Onoda, S, Ohshima, T, Jacques, V, Dréau, A, Roch, J-F, Diniz, I, Auffeves, A, Vion, D, Esteve, D, Bertet, P
Format: Article
Language:English
Subjects:
Physics
Quantum Physics
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Summary:We report the experimental realization of a hybrid quantum circuit combining a superconducting qubit and an ensemble of electronic spins. The qubit, of the transmon type, is coherently coupled to the spin ensemble consisting of nitrogen-vacancy centers in a diamond crystal via a frequency-tunable superconducting resonator acting as a quantum bus. Using this circuit, we prepare a superposition of the qubit states that we store into collective excitations of the spin ensemble and retrieve back into the qubit later on. These results constitute a proof of concept of spin-ensemble based quantum memory for superconducting qubits.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.107.220501