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Coupling two charge qubits

Research output: Contribution to journalJournal articlepeer-review

  • Y Pashkin
  • T Yamamoto
  • O Astafiev
  • Y Nakamura
  • Dmitri Averin
  • J Tsai
<mark>Journal publication date</mark>1/07/2003
<mark>Journal</mark>NEC Res. Develop
Number of pages5
Pages (from-to)273-277
Publication StatusPublished
<mark>Original language</mark>English


We demonstrate a Josephson circuit consisting of two electrostatically coupled charge quantum bits (qubits). Using a pulse technique, we coherently mix quantum states and observe quantum oscillation, the spectrum of which reflects interaction between the qubits. Our results demonstrate feasibility of coupling multiple solid-state qubits, and indicate the existence of entangled two-qubit states.