Josephson flux - flow oscillator

Spectral linewidths of Josephson oscillators.

We show that the linewidth of a Josephson flux-flow oscillator has the same functional dependence on temperature, static, and dynamic resistances as the ones of Josephson single-fluxon oscillators and small Josephson junctions. This suggests a universal formula for the linewidth of Josephson oscillators.

Phase locked 270-440 GHz local oscillator based on flux flow in long Josephson tunnel junctions

Radiation linewidth of a long Josephson junction in the flux-flow regime.

Theoretical model for the radiation linewidth in a multi-fluxon state of a long Josephson junction is presented. Starting from the perturbed sine-Gordon model with the temperature dependent noise term, we develop a collective coordinate approach which allows to calculate the finite radiation linewidth due to excitation of the internal degrees of freedom in the moving fluxon chain. At low fluxon...

Direct Measurements of Tunable Josephson Plasma Resonance in the L-set

Phase dynamics has been measured in a driven mesoscopic Josephson oscillator where the resonance is tuned either by magnetic flux or by gate charge modulation of the Josephson inductance. Phenomena are analyzed in terms of a "phase particle picture", and by numerical circuit simulations. An analogy to switching of a DC-biased junction into voltage state is discussed. Operation principle of the ...

Laminar phase flow for an exponentially tapered Josephson oscillator