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KEK Cosmo 2025

2–5 Mar 2026
Asia/Tokyo timezone

Session

Opening & Session I

4 Mar 2026, 09:10

Conveners

Opening & Session I

  • Yuko Urakawa

Presentation materials

There are no materials yet.

  1. 7. The BAO-CMB Tension and Implications for Inflation
    Elisa Ferreira
    04/03/2026, 09:10
  2. 8. Quantum and classical properties of interacting primordial inhomogeneities
    Amaury Micheli
    04/03/2026, 10:10

    The statistical properties of the Cosmic Microwave Background (CMB) anisotropies, which reflect the curvature inhomogeneities of the early Universe, are well-accounted for by assuming that these inhomogeneities emerged from amplified vacuum fluctuations. As they result from a genuine quantum process, it is natural to question which properties of these primordial inhomogeneities are inherently...

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  3. 9. Quantum Nature of Primordial Gravitational Waves in Hořava-Lifshitz Gravity
    Hiroki Matsui
    04/03/2026, 10:30

    Ho\v{r}ava-Lifshitz (HL) gravity generates scale-invariant primordial density fluctuations and gravitational waves (PGWs) without requiring inflation. We investigate the quantum nature of PGWs within HL gravity. While inflationary models suggest the non-classicality (squeezed coherent state) of PGWs might be detectable via Hanbury Brown-Twiss (HBT) interferometry, we explore this possibility...

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  4. 10. The Imprints of Primordial Non- Gaussianity on the Scalar-Induced Gravitational-Wave Background
    Jun- Peng Li
    04/03/2026, 10:50

    Scalar-induced gravitational waves (SIGWs) are produced nonlinearly by enhanced curvature perturbations and serve as a promising probe of primordial non-Gaussianity (PNG) in the early Universe. In this talk, I will present our systematic study of local-type PNG imprints on the SIGW background. I will introduce a “renormalized” diagrammatic approach we developed, which simplifies calculations...

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  5. 11. Quantum Algorithm for the Fokker-Planck Equation in Cosmology
    Hou Heng Leong
    04/03/2026, 11:10

    In this talk, we present a quantum algorithm for numerically solving the Fokker-Planck equation that describes the stochastic processes in cosmology. In particular, we consider the discretization in which time evolution is represented via (sub-)stochastic transition matrices. Based on this discretization, the computation of time evolution of the numerical solution to the Fokker-Planck equation...

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