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Turning Zeeman splitting into switchable charge polarization in a double quantum dot — arXiv:2608.27625

Source: arXiv (en)
Original: https://arxiv.org/abs/2608.27625
License (as archived): CC0-1.0
Archived: 2026-10-17T11:58:37.579Z
SHA-256 of the archived text: e73bfe73b2d0961e1e869b8dd9ea8f13a256a4218f97fc29aae8b5110502ca53
Stable URL of this page: https://metraipolis.com/documento/dc_68705d2bc8a1

How to cite

Turning Zeeman splitting into switchable charge polarization in a double quantum dot — arXiv:2608.27625 — arXiv (en), https://arxiv.org/abs/2608.27625 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_68705d2bc8a1 (Metraipolis archive dc_68705d2bc8a1, sha256 e73bfe73b2d0961e1e869b8dd9ea8f13a256a4218f97fc29aae8b5110502ca53)

BibTeX

@misc{dc68705d2bc8a1,
  title = {Turning Zeeman splitting into switchable charge polarization in a double quantum dot — arXiv:2608.27625},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2608.27625},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_68705d2bc8a1; sha256 e73bfe73b2d0961e1e869b8dd9ea8f13a256a4218f97fc29aae8b5110502ca53},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2608.27625. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

A magnetic field that acts identically on two quantum dots is not expected to move charge between them. Nevertheless, we show that a uniform Zeeman field can strongly reconfigure and even reverse the single-electron charge polarization of an asymmetric open double quantum dot. Using a symmetry-preserving Green's-function equation-of-motion approach, we identify regimes where the preferred dot occupation reverses while the system remains in the single-electron charge sector. Two distinct mechanisms produce this behavior. Unequal gate levels produce different occupation responses because the Zeeman-shifted resonances lie at different positions relative to the reservoir chemical potential, whereas unequal onsite interactions distinguish the dots through their many-body addition spectra. Coulomb blockade stabilizes the single-electron sector, causing the reservoir-mediated response to appear as spatial charge redistribution rather than a change in total occupation. Our results establish a mechanism for magnetic control of charge polarization at fixed electrostatic detuning.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-08-31 in quant-ph).
Categorie arXiv: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2608.27625 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-17T11:28:37.551Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-08-31?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).