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PreprintCC BY 4.0arXiv

Remote Flux Refocuses Nonadiabatic Excursions in Compact-State Quantum Transfer

  • X. S. Meng
  • Y. S. Liu
  • X. Z. Zhang
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Abstract

Compact states embedded in a propagating band can carry quantum information, but finite-time transfer can populate modes outside their subspace. We show that a remote flux can refocus this amplitude without changing the transfer states or the motion-induced coupling out of their subspace. In a resonator ring, this separation is exact because both endpoints of the flux-bearing bond are nodes of every compact transfer state. For the same pulse, zero and refocusing flux both produce substantial excursions, but only the latter yields near-complete logical transfer. Interference between matrix amplitudes associated with different windings suppresses the endpoint error. Under matched control bounds, numerical optimization yields higher worst-input fidelity at the refocusing flux, providing a route to accurate transfer through coherent return.

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Cite

BibTeXRIS
BibTeX
@misc{meng2026remote,
  title = {{Remote Flux Refocuses Nonadiabatic Excursions in Compact-State Quantum Transfer}},
  author = {X. S. Meng and Y. S. Liu and X. Z. Zhang},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2609.07198},
  eprint = {2609.07198},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.07198},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Remote Flux Refocuses Nonadiabatic Excursions in Compact-State Quantum Transfer
AU  - X. S. Meng
AU  - Y. S. Liu
AU  - X. Z. Zhang
PY  - 2026
DA  - 2026/10/05
PB  - arXiv
DO  - 10.48550/arxiv.2609.07198
UR  - https://arxiv.org/abs/2609.07198
AB  - Compact states embedded in a propagating band can carry quantum information, but finite-time transfer can populate modes outside their subspace. We show that a remote flux can refocus this amplitude without changing the transfer states or the motion-induced coupling out of their subspace. In a resonator ring, this separation is exact because both endpoints of the flux-bearing bond are nodes of every compact transfer state. For the same pulse, zero and refocusing flux both produce substantial excursions, but only the latter yields near-complete logical transfer. Interference between matrix amplitudes associated with different windings suppresses the endpoint error. Under matched control bounds, numerical optimization yields higher worst-input fidelity at the refocusing flux, providing a route to accurate transfer through coherent return.
ER  -