Researchers at University of Valencia Develop Novel Quantum Correlation Source for Quantum Technologies

Strategic Insights -

Researchers at the University of Valencia have successfully developed a compact single-cavity source capable of generating quantum correlations, specifically squeezing and entanglement, for applications in quantum technologies such as metrology, computation, and simulation.

The research team, led by Navarrete-Benlloch Carlos, has proposed a novel quantum correlation source based on a nondegenerate optical parametric oscillator operated below threshold. This design enables the generation of light-signal and idler beams that are quadrature-squeezed individually while maintaining global entanglement.

Key Takeaways:

  • The researchers have developed a compact single-cavity source capable of generating hybrid quantum correlations, including squeezing and entanglement.
  • The source is designed for applications in quantum technologies such as metrology, computation, and simulation.
  • The novel quantum correlation source uses a nondegenerate optical parametric oscillator operated below threshold.
  • The design enables the generation of light-signal and idler beams that are quadrature-squeezed individually while maintaining global entanglement.
  • The research team proposes two physical implementations of this system: one based on intra-cavity electro-optic modulators and the other on optomechanical interactions.
  • The source opens the door to novel quantum communication and metrology protocols.

Statistics:

  • 2025: The year in which the research was conducted and published.
  • 335: The volume number of the EPJ Web of Conferences publication.
  • 06006: The article number of the EPJ Web of Conferences publication.
  • 10.1051/epjconf/202533506006: The DOI of the EPJ Web of Conferences article.

Sources:

  • EPJ Web of Conferences, "Hybrid quantum correlations from a single cavity: Generating simultaneously squeezed and entangled optical beams," 2025.
  • Physics Week, "Research on Physics Reported by Researchers at University of Valencia (Hybrid quantum correlations from a single cavity: Generating simultaneously squeezed and entangled optical beams)," October 21, 2025.
  • University of Valencia, "Departament d'Optica"