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VOLUME 86 | ISSUE 3 | PAGE 239
On the possibility of magnetic flux detection by Andreev quantum dot
I. A. Sadovskyy*, G. B. Lesovik*, G. Blatter^\nabla
*L.D. Landau Institute for Theoretical Physics RAS, 117940 Moscow, Russia
^\nablaTheoretische Physik, ETH-Zurich, CH-8093 Zürich, Switzerland

PACS: 73.21.La, 74.45.+c, 07.55.Ge
The charge of subgap state in Andreev quantum dot (AQD) inserted into the superconducting loop is very sensitive to the magnetic flux threading the loop. We studied the sensitivity as a function of AQD parameters in details in Δ → ∞ limit. We also accounted for a weak Coulomb interaction in AQD. We discuss a possibility of using this setup as a device detecting week magnetic field.

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