Signature of Quantum Chaos in SQUID's
T. Kato, K. Tanimoto, K. Nakamura
TL;DR
This paper investigates how spectral statistics in SQUIDs reveal quantum chaos signatures, showing a transition from GUE to GOE statistics influenced by magnetic flux and symmetries.
Contribution
It demonstrates the spectral crossover in SQUIDs controlled by magnetic flux and analyzes the impact of discrete symmetries on level statistics.
Findings
Spectral statistics in SQUIDs can transition from GUE to GOE.
External magnetic flux controls the spectral crossover.
Secondary symmetries affect spectral properties in specific regions.
Abstract
Spectral statistics in band structures is studied in a realistic model describing superconducting quantum interference devices (SQUID's). By controlling an external magnetic flux, the level statistics may show a crossover from the GUE to the GOE. Effects of secondary discrete symmetries seen in specific regions of the first Brillouin zone are also discussed.
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Taxonomy
TopicsQuantum and electron transport phenomena · Physics of Superconductivity and Magnetism · Semiconductor Quantum Structures and Devices