Quantum capacitive phase detector

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We discuss how a single Cooper-pair transistor may be used to detect the superconducting phase difference by using the phase dependence of the input capacitance from gate to ground. The proposed device has a low power dissipation because its operation is in principle free from quasiparticle generation. According to the sensitivity estimates, the device may be used for efficient qubit readout in a galvanically isolated and symmetrized circuit.
Original languageEnglish
Article number024530
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Issue number2
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed


  • Cooper-pair transistor
  • phase detector
  • superconducting phase


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