Resistively-shunted superconducting quantum point contacts
D.V. Averin, A. Bardas, and H.T. Imam (SUNY at Stony Brook)
TL;DR
This paper investigates the Josephson dynamics of resistively-shunted superconducting quantum point contacts, revealing new features due to fluctuations in Andreev level occupations, with implications for quantum device behavior.
Contribution
It provides a detailed analysis of Josephson dynamics in quantum point contacts, highlighting fluctuation effects not present in classical tunnel junctions.
Findings
Identification of temporal fluctuations in Josephson potential
Demonstration of finite temperature effects on dynamics
Comparison with classical Josephson junction behavior
Abstract
We have studied the Josephson dynamics of resistively-shunted ballistic superconducting quantum point contacts at finite temperatures and arbitrary number of conducting modes. Compared to the classical Josephson dynamics of tunnel junctions, dynamics of quantum point contacts exhibits several new features associated with temporal fluctuations of the Josephson potential caused by fluctuations in the occupation of the current-carrying Andreev levels.
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