The breaking of time-reversal symmetry in a triplet superconductor Josephson junction is shown to cause a magnetic instability of the tunneling barrier. Using a Ginzburg-Landau analysis of the free energy, we predict that this novel functional behavior reflects the formation of an exotic Josephson state, distinguished by the existence of fractional flux quanta at the barrier. The crucial role o...

Experiments with small capacitance Josephson junction arrays are described that demonstrate the quantum behavior of the phase of the superconducting condensate. This quantum behavior is based on the complementarity of phase and number for a condensate state of many bosons. A key factor to observation of this quantum behavior is the coupling of the superconducting condensate state to dissipation...

The transport critical current in high-Tc superconducting systems is considerably limited by the microstructural characteristics of these materials [1]. Indeed, if we schematize these systems as a collection of weakly-coupled superconducting islands, we may adopt Josephson junction network models to describe their electrodynamic response. With the aid of these models one can show that the maxim...

Bijunctions are three-terminal Josephson junctions where three superconductors are connected by a single weak link made of a metallic region or of quantum dots. Biasing two of the superconductors with commensurate voltages yields Andreev resonances that produce d.c. Josephson currents made of correlated Cooper pairs. For instance with applied voltages (0, V,−V ), quartets formed by two entangle...

We propose a semiconductor-superconductor hybrid device for realizing topological superconductivity and Majorana zero modes consisting of planar Josephson junction structure with periodically modulated width. By performing numerical analysis the effective model describing low-energy physics structure, we demonstrate that modulation width results in substantial enhancement gap and, consequently,...

We describe the design for a solid-state quantum computational architecture based on the integration of GHz-frequency mechanical resonators with Josephson phase qubits, which have the potential for demonstrating a variety of singleand multi-qubit operations critical to quantum computation. The computational qubits are eigenstates of large-area, current-biased Josephson junctions. Two or more qu...