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PreprintCC BY 4.0arXiv

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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Cite

BibTeXRIS
BibTeX
@misc{zhang2026josephsonphase,
  title = {{Josephson-Phase Reversal of Non-Bloch Andreev Propagation}},
  author = {X. Z. Zhang and Hechen Ren},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.29787},
  eprint = {2608.29787},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.29787},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Josephson-Phase Reversal of Non-Bloch Andreev Propagation
AU  - X. Z. Zhang
AU  - Hechen Ren
PY  - 2026
DA  - 2026/08/30
PB  - arXiv
DO  - 10.48550/arxiv.2608.29787
UR  - https://arxiv.org/abs/2608.29787
AB  - 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.
ER  -