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Suppression of timing errors in short overdamped josephson junctions.
Andrey L Pankratov1, Bernardo Spagnolo
1Institute for Physics of Microstructures of RAS, GSP-105, Nizhny Novgorod 603950, Russia. alp@ipm.sci-nnov.ru
Physical Review Letters
|November 5, 2004
Summary
This study analyzes Josephson junctions, finding that optimizing for speed also minimizes timing errors under specific driving conditions. This research is crucial for developing faster and more accurate electronic devices.
Area of Science:
- Condensed matter physics
- Quantum electronics
Background:
- Josephson junctions are key components in superconducting electronics.
- Understanding their temporal characteristics under external influences is critical for device performance.
Purpose of the Study:
- To analyze the impact of fluctuations and periodic driving on the temporal behavior of short overdamped Josephson junctions.
- To investigate the relationship between driving frequency, switching time, and timing errors.
Main Methods:
- Analysis of standard deviation of switching time under dichotomous driving force.
- Observation and analysis of the resonant activation effect for sinusoidal driving.
- Mathematical modeling of temporal characteristics.
Main Results:
- Derived the standard deviation of switching time for arbitrary noise intensity and practical frequencies.
- Observed resonant activation effect with sinusoidal driving.
- Identified a minimum in both mean switching time and its standard deviation as a function of driving frequency.
Conclusions:
- Optimizing Josephson junction operation for faster switching inherently minimizes timing errors.
- Periodic driving forces can be used to control and improve the temporal performance of Josephson junctions.