Josephson-Phase Reversal of Non-Bloch Andreev Propagation

• URL: http://arxiv.org/abs/2608.29787v1
• Date: Sun, 30 Aug 2026 13:31:48 GMT
• Title: Josephson-Phase Reversal of Non-Bloch Andreev Propagation
• Abstract summary: Non-Hermitian control is difficult in solid-state systems due to fixed dissipation.<n>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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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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