Josephson-Phase Reversal of Non-Bloch Andreev Propagation

Abstract: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.

Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Superconductivity (cond-mat.supr-con); Quantum Physics (quant-ph)

arXiv:2608.29787 [cond-mat.mes-hall]

(or arXiv:2608.29787v1 [cond-mat.mes-hall] for this version)

https://doi.org/10.48550/arXiv.2608.29787 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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