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Probing Deconfined Quantum Criticality Point on a Digital Quantum Computer — arXiv:2610.21761

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.21761
License (as archived): CC0-1.0
Archived: 2026-10-16T10:49:26.327Z
SHA-256 of the archived text: f1341704b119ad0aaea83d5e0b4d1c2bfe051a4e45827f8ca4699aa3f19dbc9a
Stable URL of this page: https://metraipolis.com/documento/dc_19c859ff673d

How to cite

Probing Deconfined Quantum Criticality Point on a Digital Quantum Computer — arXiv:2610.21761 — arXiv (en), https://arxiv.org/abs/2610.21761 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_19c859ff673d (Metraipolis archive dc_19c859ff673d, sha256 f1341704b119ad0aaea83d5e0b4d1c2bfe051a4e45827f8ca4699aa3f19dbc9a)

BibTeX

@misc{dc19c859ff673d,
  title = {Probing Deconfined Quantum Criticality Point on a Digital Quantum Computer — arXiv:2610.21761},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.21761},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_19c859ff673d; sha256 f1341704b119ad0aaea83d5e0b4d1c2bfe051a4e45827f8ca4699aa3f19dbc9a},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.21761. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

A deconfined quantum critical point (DQCP) is a continuous transition between ordered phases with unrelated broken symmetries, beyond the Landau-Ginzburg-Wilson paradigm. In one dimension, such a transition between a $z$-polarized ferromagnet (zFM) and a valence-bond solid (VBS) is well established numerically in a frustrated spin-$1/2$ chain. Here we ask whether a superconducting quantum processor can resolve this transition and its signatures despite finite-size effects and device noise. The ground states are prepared by ancilla-projected quantum imaginary-time evolution (QITE), whose exact target states are compressed by tensor-network optimization into shallow depth quantum circuits. The hardware data distinguish the phases through their order parameters, spin and dimer correlations, structure factors, correlation ratios, and snapshot distributions. The crossing of the order parameters locates the transition, and its finite-size extrapolation lies close to the thermodynamic-limit value obtained from large-scale numerics. A noise model based on the device calibration accounts quantitatively for the reduced amplitudes measured on hardware. Our findings demonstrate that a Landau-forbidden transition between competing orders can be resolved on current quantum processors.

Tema degli esploratori: fisica e astronomia (elenco arXiv quant-ph, nuovi lavori del giorno).
Categorie arXiv: Strongly Correlated Electrons (cond-mat.str-el) ; Quantum Gases (cond-mat.quant-gas); Quantum Physics (quant-ph).
Pagina del lavoro: https://arxiv.org/abs/2610.21761 — 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 2026-10-16T08:55:37.249Z dalla pagina https://arxiv.org/list/quant-ph/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).