Cavity-mediated entanglement generation via landau-zener interferometry

C. M. Quintana, K. D. Petersson, L. W. McFaul, S. J. Srinivasan, A. A. Houck, J. R. Petta

Research output: Contribution to journalArticle

32 Scopus citations

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-Stückelberg 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.

Original languageEnglish (US)
Article number173603
JournalPhysical review letters
Volume110
Issue number17
DOIs
StatePublished - Apr 26 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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