We theoretically study the behavior of critical current a thermally-biased tunnel Josephson junction with particular design, in which electrodes are enclosed two different superconducting loops pierced by independent magnetic fluxes. In this setup, gaps can be modified independently through fluxes threading loops. investigate response device as function fluxes, changing asymmetry parameter, i.e...

Asymptotic states in long Josephson junctions are investigated in an external magnetic field. We show that a choice one of the solution of the stationary Ferrell-Prange equation can carry be out with use of an asymptotic solution of the sine-Gordon equation and that an evolution to that stable solution occurs by passing through metastable states, which is determined with a form of quickly dampe...

The most important practical characteristic of a Josephson junction is its critical current. The shape of the junction determines the specific form of the magnetic-field dependence of the its Josephson current. Here we address the magnetic diffraction patterns of specially shaped planar Josephson tunnel junctions. We focus on a wide ensemble of generalized ellipses, called superellipses, which ...

Nonequilibrium quasiparticles are ubiquitous in superconducting electronics. These can trap the internal Andreev bound states of a phase-biased Josephson junction, providing mechanism for studying their presence and behavior. We characterize quasiparticle trapping detector device based on two-junction aluminum nanobridge quantum interference incorporated into transmission-line resonator. When f...

Supercurrent flow between two superconductors with different order parameters, a phenomenon known as the Josephson effect, can be achieved by inserting a non-superconducting material between two superconductors to decouple their wavefunctions. These Josephson junctions have been employed in fields ranging from digital to quantum electronics, yet their functionality is limited by the interface q...

Due to their unique properties as lossless, nonlinear circuit elements, Josephson junctions lie at the heart of superconducting quantum information processing. Previously, we demonstrated a two-layer, submicrometer-scale overlap junction fabrication process suitable for qubits with long coherence times. Here, extend micrometer-scale junctions. This allows us fabricate other devices. For example...

Quantum annealers require accurate control and optimized operation schemes to reduce noise levels, in order eventually demonstrate a computational advantage over classical algorithms. We study high coherence four-junction capacitively shunted flux qubit (CSFQ), using dispersive measurements extract system parameters model the device. Josephson junction asymmetry inherent device causes deleterio...