{
  "id": 18761011,
  "title": "Two paths, one flux: Trapped ions simulate Aharonov–Bohm interference in a lattice gauge theory",
  "url": "https://urgent.news/2026/11/07/two-paths-one-flux-trapped-ions-simulate-aharonov-bohm-interference",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-07T18:00:02.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-11-paths-flux-ions-simulate-aharonovbohm.html"
  },
  "original_language": "en",
  "account": "In a groundbreaking study published in Nature Physics, researchers have successfully simulated the Aharonov-Bohm effect using a hybrid trapped-ion quantum computer. This achievement represents a significant step forward in the field of quantum computing and our understanding of lattice gauge theories, which describe the interactions between matter and gauge fields.\n\nGauge theories, which form the foundation of the Standard Model of particle physics, govern how matter interacts through fields known as gauge fields. These fields carry the electromagnetic, weak, and strong forces. While lattice gauge theories model space as a grid with matter at its vertices and gauge fields on the connecting links, most previous simulations have been limited to one spatial dimension.\n\nTo overcome this limitation, researchers from the University of Oxford utilized trapped ions to simulate a Z₂ lattice gauge theory in a quasi-two-dimensional loop. Trapped ions serve a dual purpose in this experiment: their electronic states encode the gauge fields, while their vibrations encode the matter. The first author of the study, Sebastian Saner, highlighted the team's brainstorming process, which began in 2022 and led to the idea of using entangled qubits to encode the gauge-field flux.\n\nThe team constructed a closed loop using two trapped ions to study how a flux stored in entangled qubits would influence a moving particle. This setup allowed them to explore the effects of gauge fields on particle motion, a crucial aspect of quantum chromodynamics and other gauge theories.\n\nLattice gauge theories are particularly relevant to topological quantum error correction, a field that seeks to protect quantum information from errors due to environmental noise. In these theories, the gauge fields emerge from the collective behavior of electrons, and their interactions can give rise to exotic particles known as visons.\n\nThe researchers were able to simulate the two-dimensional geometry of the lattice by coupling qubits and vibrational modes, known as synthetic dimensions. By applying a laser to manipulate the vibrational modes, the physicists observed the particle tunneling between two sites, with the field line switching between present and absent. This observation is consistent with the Z₂ version of Gauss's law, which describes how electric fields behave in the presence of a magnetic flux.\n\nThis experimental breakthrough demonstrates the potential of trapped-ion quantum computers to tackle complex quantum simulations, opening up new avenues for research in quantum computing and theoretical physics.",
  "summary": "In a new Nature Physics study, researchers demonstrated the Aharonov-Bohm effect in a quantum simulation of a lattice gauge theory using a hybrid trapped-ion quantum computer.",
  "key_points": [
    "Researchers simulated Aharonov-Bohm effect using trapped ions in a lattice gauge theory",
    "Trapped ions encoded gauge fields and matter in the experiment",
    "Study advances quantum computing and understanding of gauge theories"
  ],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}