Phase‐locked flux‐flow Josephson oscillator

Josephson flux - flow oscillator

Phaselocked Solutions Of The Finite Size Kuramoto Coupled Oscillator Model

We investigate properties of phaselocked solutions of the finite size Kuramoto coupled oscillator model. There are minimal assumptions on the frequencies ω1, . . . , ωN in the model. The coupling constant is denoted by α, and a key parameter γ is introduced which is proportional to 1 α . Theorem 1.1(III) gives new predictions for the location of γ∗, the “phaselocking threshold.” When N is large...

Antiferromagnetic THz-frequency Josephson-like Oscillator Driven by Spin Current

The development of compact and tunable room temperature sources of coherent THz-frequency signals would open a way for numerous new applications. The existing approaches to THz-frequency generation based on superconductor Josephson junctions (JJ), free electron lasers, and quantum cascades require cryogenic temperatures or/and complex setups, preventing the miniaturization and wide use of these...

Laminar phase flow for an exponentially tapered Josephson oscillator

Josephson junction mixer using an external local oscillator

2014 Mixing experiments on niobium point contacts are reported for conversion from 95 GHz to 140 MHz. The conversion efficiency is less than predicted by the highly damped weak link model. The discrepancy is presumably due to mixing with higher harmonics of the local oscillator. The lowest noise temperature measured was T ~ 100 K which is of the same order as recently reported for cooled Schott...