Frequency divider by underdamped Josephson transmission line
نویسندگان
چکیده
منابع مشابه
Dynamics of an underdamped Josephson-junction ladder.
We show analytically that the dynamical equations for an underdamped ladder of coupled small Josephson junctions can be approximately reduced to the discrete sine-Gordon equation. As numerical confirmation, we solve the coupled Josephson equations for such a ladder in a magnetic field. We obtain discrete-sine-Gordon-like IV characteristics, including a flux flow and a “whirling” regime at low a...
متن کاملSynchronization of underdamped Josephson-junction arrays
Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction between the junctions in the array and an electromagnetic cavity. Here we show that a model of a one-dime...
متن کاملSpontaneous synchronization in a Josephson transmission line.
At high frequencies, the dynamics of a Josephson array shows fundamental differences from its low-frequency behavior. We consider a simple array where the high-frequency effects are dominant, a current biased series array without any external load. Despite the absence of a load, the oscillators are dynamically coupled at high frequencies, and synchronized states can be attracting. We investigat...
متن کاملNon-uniform Transmission Line Ultra-wideband Wilkinson Power Divider
We propose a technique with clear guidelines to design a compact planar Wilkinson power divider (WPD) for ultra-wideband (UWB) applications. The design procedure is accomplished by replacing the uniform transmission lines in each arm of the conventional power divider with varying-impedance profiles governed by a truncated Fourier series. Such non-uniform transmission lines (NTLs) are obtained t...
متن کاملQuantum phase diffusion in a small underdamped Josephson junction.
Quantum phase diffusion in a small underdamped Nb/AlO(x)/Nb junction (∼0.4 μm(2)) is demonstrated in a wide temperature range of 25-140 mK where macroscopic quantum tunneling (MQT) is the dominant escape mechanism. We propose a two-step transition model to describe the switching process in which the escape rate out of the potential well and the transition rate from phase diffusion to the runnin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 2009
ISSN: 1434-6028,1434-6036
DOI: 10.1140/epjb/e2009-00295-y