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Harvard University

Superradiance in Media with Refractive Index Close to Zero: A Breakthrough for Quantum Computing

Strategic Insights

— 1 min read

Superradiance, a phenomenon where elements such as atoms synchronize to emit more powerful light, has been an area of interest for scientists for over half a century. Recently, Professor Michael Lobet and his team at the University of Namur's Department of Physics, in collaboration with Harvard University and Michigan Technological University, have made a significant contribution to the development of quantum computing. By using a material with a refractive index close to zero, they have been able to improve the range of entanglement between transmitters, up to 17 times greater than in a vacuum.

Key Takeaways:

  • Professor Michael Lobet and his team have developed a photonic chip capable of radically improving the range of entanglement between transmitters, up to 17 times greater than in a vacuum.
  • The team used a material with a refractive index close to zero, which allows the emitters to be spatially distant and yet find themselves optically close to each other, enabling quantum entanglement.
  • The emitters were made from nitrogen vacancy (NV) diamonds, structures well known in quantum optics.
  • The team's work is part of the "second quantum revolution", which aims to build on the fundamental discoveries of Einstein and the other founding fathers of quantum mechanics.
  • The prospect of this research is that it could lead to more efficient lasers, more sensitive optical sensors, and faster and ultra-secure telecommunication tools, thanks to quantum computers.
  • The team plans to transform their theoretical project into concrete experimental realizations, with the aim of getting a little closer to practical quantum systems.

Statistics:

  • The range of entanglement between transmitters has been improved by up to 17 times greater than in a vacuum.
  • The team used nitrogen vacancy (NV) diamonds as the emitters.
  • The convenience of using a near-zero refractive index medium can lead to more power-efficient and longer-range quantum entanglement.
  • The research has been supported by the FNRS for funding the research mandates of Michael Lobet and Adrien Debacq, and the PTCI technology platform, whose supercomputers made this study possible.

Sources:

  • Professor Michael Lobet, University of Namur's Department of Physics
  • Harvard University
  • Michigan Technological University (MTU)
  • Sparrow Quantum (supporting company)
  • FNRS (French National Research Agency)
  • PTCI (technology platform)
  • United States Army Research Office under MURI grant (W911NF2420195)
  • Light: Science & Applications, Nature's prestigious journal (publication)

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