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Cavity-Mediated Entanglement Generation Via Landau-Zener Interferometry

Author(s): Quintana, CM; Petersson, KD; McFaul, LW; Srinivasan, SJ; Houck, Andrew A; et al

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Abstract: We demonstrate quantum control and entanglement generation using a Landau-Zener beam splitter formed by coupling two transmon qubits to a superconducting cavity. Single passage through the cavity-mediated qubit-qubit avoided crossing provides a direct test of the Landau-Zener transition formula. Consecutive sweeps result in Landau-Zener-Stuckelberg interference patterns, with a visibility that can be sensitively tuned by adjusting the level velocity through both the nonadiabatic and adiabatic regimes. Two-qubit state tomography indicates that a Bell state can be generated via a single passage, with a fidelity of 78% limited by qubit relaxation. DOI: 10.1103/PhysRevLett.110.173603
Publication Date: 26-Apr-2013
Electronic Publication Date: 26-Apr-2013
Citation: Quintana, CM, Petersson, KD, McFaul, LW, Srinivasan, SJ, Houck, AA, Petta, JR. (2013). Cavity-Mediated Entanglement Generation Via Landau-Zener Interferometry. PHYSICAL REVIEW LETTERS, 110 (10.1103/PhysRevLett.110.173603
DOI: doi:10.1103/PhysRevLett.110.173603
ISSN: 0031-9007
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW LETTERS
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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