Spectroscopy of three strongly coupled flux qubits

Antti Niskanen (Corresponding Author), K. Harrabi, F. Yoshihara, Y. Nakamura, J.S. Tsai

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)


We have carried out spectroscopic measurements of a system of three strongly coupled four-junction flux qubits. The samples studied cover a wide range of parameters with the coupling energy between neighboring qubits varying between
0.75 GHz and 6.05 GHz. The observed complicated spectra agree well with eight-level theory. The experiments are relevant for the realization of a tunable coupling between qubits.
Original languageEnglish
Article number220503
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Issue number22
Publication statusPublished - 2006
MoE publication typeA1 Journal article-refereed


  • quantum computing
  • antiferromagnetism
  • Josephson junction
  • qubits


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