非布洛赫安德烈夫传播的约瑟夫森相位反转
Josephson-Phase Reversal of Non-Bloch Andreev Propagation
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中文总结 AI 辅助
本研究在自旋轨道耦合平面约瑟夫森结中，仅通过改变约瑟夫森相位即可反转低能安德烈夫带的非布洛赫传播、切换其边界积累，为超导平台实现可重构非厄米输运提供了原位方案。
中文摘要 AI 辅助
固态系统中因耗散固定，非厄米控制颇具难度。本研究表明，在自旋轨道耦合的平面约瑟夫森结中，仅改变约瑟夫森相位即可反转低能安德烈夫带的非布洛赫传播，并使其边界积累在结的两侧切换；该相位会重塑能带的自旋与电子-空穴组分，使固定库仑池对反向传播模式产生不等衰减；弱损耗理论将这种相位控制的损耗失衡与边界选定的复动量关联，为超导平台中可重构非厄米输运提供了原位途径。
英文摘要
Non-Hermitian control is difficult in solid-state systems due to fixed dissipation. Here, we show that in a spin-orbit-coupled planar Josephson junction, changing only the Josephson phase reverses the non-Bloch propagation of a low-energy Andreev band and switches its boundary accumulation between junction edges. The phase reshapes the band's spin and electron-hole composition, causing a fixed reservoir to unequally attenuate counterpropagating modes. Weak-loss theory links this phase-controlled loss imbalance to boundary-selected complex momenta, offering an in situ route to reconfigurable non-Hermitian transport in superconducting platforms.
发表机构
- College of Physics and Materials Science, Tianjin Normal University（天津师范大学物理与材料科学学院）
- Interdisciplinary Center, Tianjin Normal University（天津师范大学交叉研究中心）
- Center for Joint Quantum Studies & Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University（天津大学理学院物理系量子联合研究中心及天津市低维材料物理与制备技术重点实验室）
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