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Superconducting circuits host two-level systems with lifetimes exceeding one second — arXiv:2610.21853

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.21853
License (as archived): CC0-1.0
Archived: 2026-10-16T10:44:55.529Z
SHA-256 of the archived text: ed295517fa50f224b8980db5aa75c86b36b9326e657f1998644e3d4162ed29d7
Stable URL of this page: https://metraipolis.com/documento/dc_d91ede12e005

How to cite

Superconducting circuits host two-level systems with lifetimes exceeding one second — arXiv:2610.21853 — arXiv (en), https://arxiv.org/abs/2610.21853 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_d91ede12e005 (Metraipolis archive dc_d91ede12e005, sha256 ed295517fa50f224b8980db5aa75c86b36b9326e657f1998644e3d4162ed29d7)

BibTeX

@misc{dcd91ede12e005,
  title = {Superconducting circuits host two-level systems with lifetimes exceeding one second — arXiv:2610.21853},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.21853},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_d91ede12e005; sha256 ed295517fa50f224b8980db5aa75c86b36b9326e657f1998644e3d4162ed29d7},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.21853. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Understanding the microscopic environment of superconducting qubits is a central challenge for quantum technologies. Parasitic two-level systems (TLSs) of various microscopic origins are ubiquitous and limit qubit performance through decoherence, frequency drifts, and leakage. Recently, long-lived TLSs with lifetimes exceeding those of state-of-the-art qubits have been shown to induce correlated qubit dynamics, with direct implications for quantum error correction. Here, we perform wide-band quantum-jump correlation spectroscopy on flux-tunable transmon qubits and identify microscopic degrees of freedom that outlive the qubit by orders of magnitude. Pump-probe measurements at varying detunings from these objects reveal intrinsic lifetimes exceeding one second. Their weak coupling to the qubit, in the kilohertz range, is consistent with positional defects described by the standard tunneling model, without excluding other microscopic origins such as magnetic spin impurities or trapped quasiparticles. More broadly, these results establish superconducting qubits as a sensitive probe of exceptionally long-lived microscopic degrees of freedom and open a route toward their controlled access and functionalization.

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/2610.21853 — 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 2026-10-16T08:55:37.195Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).