Improving high-T_c dc-SQUID performance by junction asymmetry
Urbasi Sinha, Aninda Sinha, Frank K. Wilhelm
TL;DR
This paper investigates how junction asymmetry affects noise and performance in high-T_c dc SQUIDs, revealing that asymmetry reduces noise energy despite increasing transmission line resonances, thus improving device performance.
Contribution
It demonstrates that resistance asymmetry in high-T_c dc SQUIDs reduces noise energy and enhances performance by mitigating transmission line resonance effects.
Findings
Resistance asymmetry enhances transmission line resonances.
Asymmetry reduces noise energy significantly.
Performance of SQUIDs is improved by asymmetry.
Abstract
We study noise and noise energy of a high-T dc SQUID fabricated on a high- substrate whose conduction properties are given by transmission line physics. We show that transmission line resonances greatly enhance the noise. Remarkably, resistance asymmetry enhances these resonances even more. However, as the transfer function scales the same way, the noise energy is reduced by asymmetry greatly enhancing the flexibility and performance of the SQUID.
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