Engineered selection rules for tunable coupling in a superconducting quantum circuit

K. Harrabi, F. Yoshihara, Antti Niskanen, Y. Nakamura, J.S. Tsai

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)


Engineering selection rules of transitions is a useful strategy for coupling and decoupling qubits in superconducting quantum circuits. Following this approach, we implement a tunable coupling scheme between two flux qubits. The qubits are coupled parametrically under microwave driving via the nonlinear inductance of a third qubit. The measured on-state coupling as well as the off-state residual coupling depends on the coupler bias and agrees quantitatively with a calculation of transition matrix elements of a three-qubit Hamiltonian.
Original languageEnglish
Article number020507
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number2
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed


  • quantum computing
  • qubits
  • coupling
  • decoupling


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