Josephson-Phase Reversal of Non-Bloch Andreev Propagation

X. Z. Zhang; Hechen Ren

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arXiv · 2608.29787

Josephson-Phase Reversal of Non-Bloch Andreev Propagation

X. Z. Zhang·Hechen Ren

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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.

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X. Z. Zhang, Hechen Ren. 2026-08-30. Josephson-Phase Reversal of Non-Bloch Andreev Propagation. https://arxiv.org/abs/2608.29787

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