Charging Effects in the Inductively Shunted Josephson Junction
Jens Koch, V. Manucharyan, M. H. Devoret, L. I. Glazman
DOI 10.1103/PhysRevLett.103.217004 · Physical Review Letters
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Abstract
The choice of impedance used to shunt a Josephson junction determines if the charge transferred through the circuit is quantized: a capacitive shunt renders the charge discrete, whereas an inductive shunt gives continuous charge. This discrepancy leads to a paradox in the limit of large inductances L. We show that while the energy spectra of the capacitively and inductively shunted junction are vastly different, their high-frequency responses become identical for large L. Inductive shunting thus opens the possibility to observe charging effects unimpeded by charge noise.
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