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Strong tunable coupling between a superconducting charge and phase qubit

183   0   0.0 ( 0 )
 Added by Olivier Buisson
 Publication date 2007
  fields Physics
and research's language is English
 Authors A. Fay




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We have realized a tunable coupling over a large frequency range between an asymmetric Cooper pair transistor (charge qubit) and a dc SQUID (phase qubit). Our circuit enables the independent manipulation of the quantum states of each qubit as well as their entanglement. The measurements of the charge qubits quantum states is performed by resonant read-out via the measurement of the quantum states of the SQUID. The measured coupling strength is in agreement with an analytic theory including a capacitive and a tunable Josephson coupling between the two qubits.



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