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Quantum Criticality in Resonant Andreev Conduction
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cond-mat.mes-hallcond-mat.str-el
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contactsquantumandreevbelowbroughtchargingconductancesconduction
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Motivated by recent experiments with proximitized nanowires, we study a mesoscopic s-wave superconductor connected via point contacts to normal-state leads. We demonstrate that at energies below the charging energy the system is described by the two-channel Kondo model, which can be brought to the quantum critical regime by varying the gate potential and conductances of the contacts.
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