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Helper-assisted quantum sensing with low dressed-state leakage — arXiv:2610.41404

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.41404
License (as archived): CC0-1.0
Archived: 2026-11-02T08:08:14.713Z
SHA-256 of the archived text: 97cb7e3ea9a54ebe7cc229882f3da4a735ef917eb17ce5729df553b7f11f805e
Stable URL of this page: https://metraipolis.com/documento/dc_ff1a60583da2

How to cite

Helper-assisted quantum sensing with low dressed-state leakage — arXiv:2610.41404 — arXiv (en), https://arxiv.org/abs/2610.41404 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_ff1a60583da2 (Metraipolis archive dc_ff1a60583da2, sha256 97cb7e3ea9a54ebe7cc229882f3da4a735ef917eb17ce5729df553b7f11f805e)

BibTeX

@misc{dcff1a60583da2,
  title = {Helper-assisted quantum sensing with low dressed-state leakage — arXiv:2610.41404},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.41404},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_ff1a60583da2; sha256 97cb7e3ea9a54ebe7cc229882f3da4a735ef917eb17ce5729df553b7f11f805e},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.41404. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

We study a two-qubit sensing protocol in which only a helper qubit is read out. Calibrated loading and unloading encode a transverse signal in the helper's phase, keep leakage out of a selected dressed-state band small, and return the sensor close to its idle ground state. We derive an information bound for a single sensor whose excitation stays below a prescribed budget, and simulate repeated operation with an uncertain coupling and finite-duration resets in a driven open-system model. At the tested settings, finite measurement records support estimation with infrequent resets. A helper flip at zero coupling, combined with a reversal of the coupling sign, suppresses a static helper offset shared across a record while retaining the signal, at a cost of about 27% of the no-offset information of a plain sequence of equal duration. Under slowly varying noise, averaging each cycle's likelihood over the correct noise law removes most of the added bias, and a wrong noise law can worsen the estimate. A selected directly read sensor with ideal controls and repeated nondemolition verification has the higher information rate. Any practical benefit of avoiding direct readout therefore requires a device-specific disturbance model.

Tema degli esploratori: fisica e astronomia (elenco arXiv quant-ph, nuovi lavori del giorno).
Categorie arXiv: Quantum Physics (quant-ph) ; Mesoscale and Nanoscale Physics (cond-mat.mes-hall).
Pagina del lavoro: https://arxiv.org/abs/2610.41404 — 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 2026-11-02T07:47:00.741Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).