Abstract
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 language | English |
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Article number | 020507 |
Number of pages | 4 |
Journal | Physical Review B: Condensed Matter and Materials Physics |
Volume | 79 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2009 |
MoE publication type | A1 Journal article-refereed |
Keywords
- quantum computing
- SQUID
- qubits
- coupling
- decoupling