Lattice Defects in Rydberg Atom Arrays

• URL: http://arxiv.org/abs/2502.07886v1
• Date: Tue, 11 Feb 2025 19:00:03 GMT
• Title: Lattice Defects in Rydberg Atom Arrays
• Abstract summary: Rydberg atom arrays have become a key platform for studying quantum many-body systems.<n>We investigate the impact of geometric defects in the simplest situation -- a one-dimensional Rydberg atom array.<n>We show that different types of kinks yield distinct outcomes corresponding to their respective spatial-internal symmetries.
• Score: 10.83896515552038
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Rydberg atom arrays have become a key platform for studying quantum many-body systems. In these setups, defects arise naturally due to various imperfections and can significantly modify the theoretical predictions compared to an ideal model. Here, we investigate the impact of geometric defects in the simplest situation -- a one-dimensional Rydberg atom array, both at and away from its emergent Ising criticality. In the presence of defects, we demonstrate that relevant physical quantities can be extracted from one-point correlation functions. At the critical point, we show that different types of kinks yield distinct outcomes corresponding to their respective spatial-internal symmetries: site-centered kinks can effectively break the array at the kink position regardless of the kink angle, while bond-centered kinks lead to interesting intermediate-coupling fixed points. In the latter case, due to a special renormalization group flow trajectory, the whole system can appear ordered if the system is not large enough. Additionally, away from criticality, the bond-centered kink induces a localization-delocalization transition of the domain wall, characteristic of quantum wetting. These findings highlight the utility of kinks as experimental probes and stress the importance of controlling defects so that experimental observations remain faithful to the pristine model.

Related papers

• A First-principles Computational Framework for Quantum Decoherence in Complex Diamond Spin Environments [6.608341476356511]
  Quantum decoherence induced by defects remains a major limitation for solid-state quantum technologies.<n>We develop a predictive framework for decoherence in diamond by combining first-principles electronic-structure calculations, quantum many-body spin-bath simulations, and experimental validation.
  arXiv  Detail & Related papers  (2026-08-03T20:03:33Z)
• Post-Critical Meson Dynamics of Kibble-Zurek Excitations in a 5,564-Qubit Quantum Annealer [0.0]
  We study a longitudinally biased quantum Ising chain, where Kibble--Zurek defect creation is followed by nonintegrable post-critical dynamics.<n>Our results show that large-scale quantum annealers can probe the fate of critical excitations beyond defect counting.
  arXiv  Detail & Related papers  (2026-07-15T13:48:10Z)
• Symmetry-protected topology and deconfined solitons in a multi-link $\mathbb{Z}_2$ gauge theory [45.88028371034407]
  We study a $mathbbZ$ lattice gauge theory defined on a multi-graph with links that can be visualized as great circles of a spherical shell.<n>We show that this leads to state-dependent tunneling amplitudes underlying a phenomenon analogous to the Peierls instability.<n>By performining a detailed analysis based on matrix product states, we prove that charge deconfinement emerges as a consequence of charge-fractionalization.
  arXiv  Detail & Related papers  (2026-03-02T22:59:25Z)
• Separation of the Kibble-Zurek Mechanism from Quantum Criticality [0.5371337604556311]
  We show that the correspondence between Kibble-Zurek scaling and quantum criticality does not hold generally.<n>Our results are based on models representative of a broad class of quasi-one-dimensional Fermi systems.
  arXiv  Detail & Related papers  (2026-02-23T14:09:21Z)
• Revisiting the Broken Symmetry Phase of Solid Hydrogen: A Neural Network Variational Monte Carlo Study [42.40832340604796]
  We show that even the broken symmetry phase observed around 130GPa requires revisiting due to its intricate coupling of electronic and nuclear degrees of freedom.<n>Our calculations reveal an unreported ground-state structure candidate for the broken symmetry phase with $Cmcm$ space group symmetry.<n>These results shed new light on the phase diagram of high-pressure hydrogen and call for further experimental verifications.
  arXiv  Detail & Related papers  (2025-12-19T15:36:27Z)
• Meson spectroscopy of exotic symmetries of Ising criticality in Rydberg atom arrays [39.58317527488534]
  Coupling two Ising chains in a ladder leads to an even richer $mathcalD(1)_8$ symmetries.<n>Here, we probe these emergent symmetries in a Rydberg atom processing unit, leveraging its geometry to realize both chain and ladder configurations.
  arXiv  Detail & Related papers  (2025-06-26T14:19:30Z)
• Topological crystals and soliton lattices in a Gross-Neveu model with Hilbert-space fragmentation [41.94295877935867]
  We explore the finite-density phase diagram of the single-flavour Gross-Neveu-Wilson (GNW) model.<n>We find a sequence of inhomogeneous ground states that arise through a real-space version of the mechanism of Hilbert-space fragmentation.
  arXiv  Detail & Related papers  (2025-06-23T14:19:35Z)
• Dynamics of quantum discommensurations in the Frenkel-Kontorova chain [30.733286944793527]
  We study how imperfections present in concrete implementations of the Frenkel-Kontorova model affect the properties of topological defects. We analyze the propagation and scattering of solitons, examining the role of quantum fluctuations and imperfections in influencing these processes.
  arXiv  Detail & Related papers  (2024-01-23T10:12:45Z)
• Charge-resolved entanglement in the presence of topological defects [0.0]
  We compute the charge-resolved entanglement entropy for a single interval in the low-lying states of the Su-Schrieffer-Heeger model. We find that, compared to the unresolved counterpart and to the pure system, a richer structure of entanglement emerges.
  arXiv  Detail & Related papers  (2023-06-27T15:03:46Z)
• Universal defects statistics with strong long-range interactions [5.8010446129208155]
  The mechanism of defect generation in long-range systems is a purely quantum process with no classical equivalent. Our findings can be tested on various experimental platforms, including Rydberg gases and trapped ions.
  arXiv  Detail & Related papers  (2023-05-19T15:55:35Z)
• Proposal for Observing Yang-Lee Criticality in Rydberg Atomic Arrays [5.4315460974430945]
  Yang-Lee edge singularities (YLES) play an important role in understanding non-Hermitian phase transitions in many-body physics. We provide a protocol for observing the YLES by detecting kinked dynamical magnetization responses due to broken PT symmetry. We propose an explicit proposal for observing YLES criticality in Floquet quenched Rydberg atomic arrays with laser-induced loss.
  arXiv  Detail & Related papers  (2023-02-13T19:48:40Z)
• Shape And Structure Preserving Differential Privacy [70.08490462870144]
  We show how the gradient of the squared distance function offers better control over sensitivity than the Laplace mechanism. We also show how using the gradient of the squared distance function offers better control over sensitivity than the Laplace mechanism.
  arXiv  Detail & Related papers  (2022-09-21T18:14:38Z)
• Review on coherent quantum emitters in hexagonal boron nitride [91.3755431537592]
  I discuss the state-of-the-art of defect centers in hexagonal boron nitride with a focus on optically coherent defect centers. The spectral transition linewidth remains unusually narrow even at room temperature. The field is put into a broad perspective with impact on quantum technology such as quantum optics, quantum photonics as well as spin optomechanics.
  arXiv  Detail & Related papers  (2022-01-31T12:49:43Z)
• Critical crossover phenomena driven by symmetry-breaking defects at quantum transitions [0.0]
  We study the effects of symmetry-breaking defects at continuous quantum transitions. The problem is addressed within renormalization-group (RG) and finite-size scaling frameworks.
  arXiv  Detail & Related papers  (2022-01-02T18:23:54Z)
• Enhanced nonlinear quantum metrology with weakly coupled solitons and particle losses [58.720142291102135]
  We offer an interferometric procedure for phase parameters estimation at the Heisenberg (up to 1/N) and super-Heisenberg scaling levels. The heart of our setup is the novel soliton Josephson Junction (SJJ) system providing the formation of the quantum probe. We illustrate that such states are close to the optimal ones even with moderate losses.
  arXiv  Detail & Related papers  (2021-08-07T09:29:23Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• Designer Magnetism in High Entropy Oxides [41.74498230885008]
  Disorder can have a dominating influence on correlated and quantum materials. In magnetic systems, spin and exchange disorder can provide access to quantum criticality, frustration, and spin dynamics. We show that high entropy oxides present an unexplored route to designing quantum materials.
  arXiv  Detail & Related papers  (2021-04-12T15:21:48Z)
• Localisation in quasiperiodic chains: a theory based on convergence of local propagators [68.8204255655161]
  We present a theory of localisation in quasiperiodic chains with nearest-neighbour hoppings, based on the convergence of local propagators. Analysing the convergence of these continued fractions, localisation or its absence can be determined, yielding in turn the critical points and mobility edges. Results are exemplified by analysing the theory for three quasiperiodic models covering a range of behaviour.
  arXiv  Detail & Related papers  (2021-02-18T16:19:52Z)
• A multiconfigurational study of the negatively charged nitrogen-vacancy center in diamond [55.58269472099399]
  Deep defects in wide band gap semiconductors have emerged as leading qubit candidates for realizing quantum sensing and information applications. Here we show that unlike single-particle treatments, the multiconfigurational quantum chemistry methods, traditionally reserved for atoms/molecules, accurately describe the many-body characteristics of the electronic states of these defect centers.
  arXiv  Detail & Related papers  (2020-08-24T01:49:54Z)
• Locating quantum critical points with Kibble-Zurek quenches [0.0]
  Scheme for finding quantum critical points based on studies of a non-equilibrium susceptibility during finite-rate quenches. We assume that two such quenches are performed in opposite directions, and argue that they lead to formation of peaks of a non-equilibrium susceptibility on opposite sides of a critical point.
  arXiv  Detail & Related papers  (2020-07-09T18:00:01Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.