Researchers Uncover New Insights into the Origins of Time

Strategic Insights -

In a groundbreaking study, physicists at the University of Zurich have proposed a new theory on the origins of time, contradicting the long-held notion of a spacetime singularity or boundary. According to the research, published in the journal "Results in Physics," the universe may have an origin of time, despite not having a beginning in the classical sense. The team, led by N.E. Rieger, has developed a coherent framework for signature-changing manifolds, which have profound implications for our understanding of causality and time.

Key Takeaways:

  • The no-boundary proposal, first proposed by Hartle and Hawking in 1983, suggests that the universe has no beginning in the sense of a spacetime singularity or boundary.
  • The University of Zurich research proposes that the universe may have an origin of time, which mathematically involves signature-type changing manifolds.
  • The framework developed by the researchers involves a degenerate yet smooth metric, which allows for a coherent description of the transition from a Riemannian to a Lorentzian region.
  • The presence of locally time-reversing loops through every point on the hypersurface H has significant causal implications.
  • The researchers prove that for every point p M, there exists a pseudo-timelike loop self-intersecting at p, which prevents any consistent distinction between future- and past-directed vectors.
  • This has a significant consequence in the creation of particle-antiparticle pairs at two distinct points, which may appear as a creation of a particle-antiparticle pair to an observer near H.

Statistics:

  • The research, published in the journal "Results in Physics," has a publication date of 2025.
  • The article is titled "Pseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical, and is available at: https://doi-org.sdpl.idm.oclc.org/10.1016/j.rinp.2025.108478.
  • The journal "Results in Physics" is published by Elsevier.
  • The research is a collaboration between N.E. Rieger, Department of Mathematics, University of Zurich, and W. Hasse.

Sources:

  • "Pseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical". Results in Physics, 2025,78():108478.
  • NewsRx. University of Zurich Researchers Have Provided New Data on Physics (Pseudo-timelike loops in signature changing semi-Riemannian manifolds with a transverse radical). Physics Week. November 4, 2025; p 431.