aiqbench analysis
This study leverages QuEra's Aquila neutral-Rydberg processor to demonstrate how geometric constraints in quasi-1D arrays induce domain-wall pinning and $\mathbb{Z}_2$ symmetry breaking. The findings reveal that hardware-specific interactions, such as van der Waals forces near engineered vacancies, cause deviations from pure 1D Ising predictions by effectively creating ferromagnetic bonds across gaps. These results provide critical insights into the physical limitations of current neutral-atom architectures and their impact on simulating disordered quantum systems.
Geometry-Induced Domain-Wall Pinning and $\mathbb{Z}_2$ Asymmetry in Nominally One-Dimensional Rydberg Arrays
arXiv:2607.27358v1 Announce Type: new Abstract: We perform experiments on QuEra's neutral-Rydberg-atom Aquila quantum computer, using quasi-adiabatic evolution on 1-dimensional models. We use hardware fine-tuning to balance the measurement statistics close to zero net magnetization, in two different geometric outlines: one closed triangular model with 33 atoms, and one 47-atom square with an engineered atom vacancy. The nature of this processor restricts the geometry of the atoms that can be programmed to a 2D plane. We report effects not predicted by the pure 1D Ising model, such as pinning of domain walls and $\mathbb{Z}_2$ symmetry breaking due to the interplay between van der Waals interactions and the Rydberg blockade. In particular, atoms around the atom vacancy and at the vertices of the 1-dimensional square-outline model strongly prefer the Rydberg state, leading to the effective model having a ferromagnetic bond across the vacancy.
Abstract:We perform experiments on QuEra's neutral-Rydberg-atom Aquila quantum computer, using quasi-adiabatic evolution on 1-dimensional models. We use hardware fine-tuning to balance the measurement statistics close to zero net magnetization, in two different geometric outlines: one closed triangular model with 33 atoms, and one 47-atom square with an engineered atom vacancy. The nature of this processor restricts the geometry of the atoms that can be programmed to a 2D plane. We report effects not predicted by the pure 1D Ising model, such as pinning of domain walls and $\mathbb{Z}_2$ symmetry breaking due to the interplay between van der Waals interactions and the Rydberg blockade. In particular, atoms around the atom vacancy and at the vertices of the 1-dimensional square-outline model strongly prefer the Rydberg state, leading to the effective model having a ferromagnetic bond across the vacancy.
Quantum Physics (quant-ph); Disordered Systems and Neural Networks (cond-mat.dis-nn); Statistical Mechanics (cond-mat.stat-mech); Atomic Physics (physics.atom-ph)
arXiv:2607.27358 [quant-ph]
(or arXiv:2607.27358v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2607.27358 arXiv-issued DOI via DataCite (pending registration)
Full text under the publisher's open licence · 166 words
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