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Mitigating sloppiness with intermediate controls in sequential multiparameter spin interferometry — arXiv:2611.01737

Source: arXiv (en)
Original: https://arxiv.org/abs/2611.01737
License (as archived): CC0-1.0
Archived: 2026-11-03T11:47:38.841Z
SHA-256 of the archived text: 2debac05061cee4b0eb8ac354398afdc968fcc02822486e6b199f7d520e3bf47
Stable URL of this page: https://metraipolis.com/documento/dc_e85599ffafa5

How to cite

Mitigating sloppiness with intermediate controls in sequential multiparameter spin interferometry — arXiv:2611.01737 — arXiv (en), https://arxiv.org/abs/2611.01737 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_e85599ffafa5 (Metraipolis archive dc_e85599ffafa5, sha256 2debac05061cee4b0eb8ac354398afdc968fcc02822486e6b199f7d520e3bf47)

BibTeX

@misc{dce85599ffafa5,
  title = {Mitigating sloppiness with intermediate controls in sequential multiparameter spin interferometry — arXiv:2611.01737},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2611.01737},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_e85599ffafa5; sha256 2debac05061cee4b0eb8ac354398afdc968fcc02822486e6b199f7d520e3bf47},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2611.01737. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Multiparameter quantum sensing requires different parameters to produce distinguishable probe responses while allowing their information to be extracted simultaneously. In sequential sensing without intermediate control, two phases encoded through the same generator are locally indistinguishable. Here we show that parameter-independent intermediate controls overcome this limitation in a collective-spin interferometer by separating the corresponding effective generators in the probe covariance geometry. Specifically, a transverse collective rotation provides an analytically tractable realization, and intermediate one-axis twisting (OAT) generates additional nonlinear operator directions and a broad regime of enhanced joint estimation. For fixed total particle number $N$ and matched twisting resource, both marginal precision bounds lie below those of a separated-OAT strategy while measurement incompatibility remains weak. For intermediate OAT, conditional optimization of an upper bound on the Holevo cost yields asymptotic $N^{-2}$ scaling. For this protocol, a fixed rotated-Dicke measurement retains simultaneous two-parameter enhancement over a broad phase region. These results show that nonlinear intermediate control can mitigate sloppiness while preserving quantum-enhanced precision with a common readout.

Tema degli esploratori: fisica e astronomia (elenco arXiv quant-ph, nuovi lavori del giorno).
Categorie arXiv: Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2611.01737 — 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 2026-11-03T11:09:37.356Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).