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Dynamical Decoupling of Nonclassical States in a Biased-Noise Spin Qudit — arXiv:2610.19676

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.19676
License (as archived): CC0-1.0
Archived: 2026-10-15T14:47:17.985Z
SHA-256 of the archived text: ff71c14c8a3aac1d24b1a3f662a45301a66effb82789be0c1886af86aaa9f5ed
Stable URL of this page: https://metraipolis.com/documento/dc_49bcdeb4d73d

How to cite

Dynamical Decoupling of Nonclassical States in a Biased-Noise Spin Qudit — arXiv:2610.19676 — arXiv (en), https://arxiv.org/abs/2610.19676 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_49bcdeb4d73d (Metraipolis archive dc_49bcdeb4d73d, sha256 ff71c14c8a3aac1d24b1a3f662a45301a66effb82789be0c1886af86aaa9f5ed)

BibTeX

@misc{dc49bcdeb4d73d,
  title = {Dynamical Decoupling of Nonclassical States in a Biased-Noise Spin Qudit — arXiv:2610.19676},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.19676},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_49bcdeb4d73d; sha256 ff71c14c8a3aac1d24b1a3f662a45301a66effb82789be0c1886af86aaa9f5ed},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.19676. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Encoding quantum information in $d$-dimensional systems (qudits) with $d>2$ offers appealing new directions for resource-efficient quantum computing. However, protecting the coherence of nonclassical qudit resource states remains an open challenge. Dynamical decoupling (DD) is a well-established technique for extending coherence, but its application to qudits is hindered by the quadratic scaling of the decoupling sequence overhead with the dimension $d$. As a result, demonstrations of qudit DD have so far been limited to low-dimensional qudits. Here, we show that noise-biased qudits enable a nontrivial reduction of this overhead, for example, from quadratic to linear. We perform qudit DD on a model $d=8$ qudit, the nuclear spin of an antimony donor in silicon. We benchmark DD performance on highly nonclassical states such as uniform superpositions, cat states, and Haar random states and measure coherence improvements up to a factor $5$ to $10$. For a spin-cat error correction code, continuous DD extends the coherence time of the logical superposition $|+\rangle_L$ to $225$~ms, compared to $19$~ms under free evolution and $85$~ms with a Hahn echo. This improvement shows that DD sequences tailored to a system's noise bias can significantly enhance the lifetime of encoded logical qubits.

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/2610.19676 — 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 2026-10-15T14:01:23.619Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).