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Superconducting Qubits Spin Qubits Silicon Quantum Computing

Josephson Effect in a T‐Shaped Triple‐Quantum‐Dot Structure: <i>π</i>‐Junction Behavior and Two‐Stage Kondo Effect

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Authors: Su-Rui Zhong, Li-Hui Jin, Chuan-Jing Yang, Xue-Si Li, Guang-Yu Yi

Year

2019

Paper ID

5430

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

110

Citations

1

Abstract

By means of the exact diagonalization approach, the interplay between the Josephson effect and the two‐stage Kondo physics in a T‐shaped triple‐quantum‐dot (TQD) junction is theoretically investigated. It is found that by adjusting the interdot couplings, the Josephson current exhibits the rich 0–π transition behaviors. These results originate from the mutual competition and cooperation of Cooper‐pair correlation and two‐stage Kondo correlation in the system. Moreover, due to the occurrence of two‐stage Kondo effect, the Josephson phase transition can be adjusted in a precise manner. It is believed that this work can help to understand the supercurrent phase transition in the QD‐based Josephson junctions.

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  • By means of the exact diagonalization approach, the interplay between the Josephson effect and the two‐stage Kondo physics in a T‐shaped triple‐quantum‐dot (TQD) junction is...

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