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Quantum capacitive phase detector

Leif Roschier·Mika Sillanpaa·Pertti Hakonen
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Abstract

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 the 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.

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Leif Roschier, Mika Sillanpaa, Pertti Hakonen. 2005-02-25. Quantum capacitive phase detector. https://doi.org/10.1103/physrevb.71.024530

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