Electron Interactions and Spin-Orbit Effects on Andreev Pair Qubits
Published:Dec 28, 2025 17:32
•1 min read
•ArXiv
Analysis
This paper explores the impact of electron-electron interactions and spin-orbit coupling on Andreev pair qubits, a type of qubit based on Andreev bound states (ABS) in quantum dot Josephson junctions. The research is significant because it investigates how these interactions can enhance spin transitions within the ABS, potentially making the qubits more susceptible to local magnetic field fluctuations and thus impacting decoherence. The findings could inform the design and control of these qubits for quantum computing applications.
Key Takeaways
- •Investigates the effects of electron-electron interaction and spin-orbit coupling on Andreev pair qubits.
- •Finds that these interactions enhance spin transitions within the Andreev bound states (ABS).
- •Highlights the potential for increased sensitivity to local magnetic field fluctuations, impacting decoherence.
- •Suggests avenues for spin control and quantum transduction, especially in the strong interaction regime.
Reference
“Electron-electron interaction admixes single-occupancy Yu-Shiba-Rusinov (YSR) components into the ABS states, thereby strongly enhancing spin transitions in the presence of spin-orbit coupling.”