{
  "id": 3221111,
  "title": "Researchers harness sunlight to generate quantum entanglement",
  "url": "https://urgent.news/2026/08/25/researchers-harness-sunlight-to-generate-quantum-entanglement",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-25T08:00:10.000Z",
  "source": {
    "name": "Physics World",
    "slug": "physics-world",
    "url": "https://physicsworld.com/a/researchers-harness-sunlight-to-generate-quantum-entanglement/"
  },
  "original_language": "en",
  "account": "Researchers have found a way to harness the abundant energy of sunlight to generate entangled photons, a key component for quantum computers. This groundbreaking development, published in Optica, could potentially revolutionize the field by providing a more energy-efficient alternative to traditional laser-pumped systems. The collaboration between the University of Ottawa and the Max Planck Institute for the Science of Light involved overcoming long-standing assumptions about the required properties of optical input. By focusing sunlight using a Fresnel lens, spectral filter, and glass cone-shaped concentrator, the researchers were able to concentrate the light to a point that could be coupled to a fiber for inducing spontaneous parametric down-conversion (SPDC). The resulting entangled photons violated Bell's inequality, demonstrating quantum behavior. The energy efficiency and scalability of this sunlight-driven method could significantly impact the future of quantum technology, potentially enabling the integration of quantum systems without the large energy costs associated with lasers.",
  "summary": "Sunlight may provide an energy-efficient alternative to lasers used in quantum computing The post Researchers harness sunlight to generate quantum entanglement appeared first on Physics World .",
  "key_points": [
    "Researchers harness sunlight for quantum entanglement generation",
    "Method uses Fresnel lens, spectral filter, and glass concentrator",
    "Entangled photons violate Bell's inequality, demonstrating quantum behavior"
  ],
  "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."
}