Observation of Bistability in a Josephson Device
We have been testing a certain type of double Josephson junction Superconducting Quantum Interference Device (SQUID) for use as a very low noise amplifier. We have found that this device is capable of displaying quasi-bistable behavior that appears to be similar to certain types of optical bistability. We have good evidence that the cause of the observed bistability is the interaction of an electromagnetic resonator (a length of transmission line) with nonlinear elements (the Josephson junctions).
KeywordsTransmission Line Output Voltage Josephson Junction External Noise Optical Bistability
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