Keynote Talk - A Snapshot of Preheating: success, challenges and possibilities

• Tom Giblin (Kenyon College)

Room: 435-437 Meeting Room

Perturbative Reheating and Thermalization

• Kyohei Mukaida (KEK)

Room: 435-437 Meeting Room In this talk, we will discuss in detail the process of reheating that is dominated by the perturbative decay of inflaton. Thought it appears to be merely a textbook exercise, we will see that the underlying physical processes are involved, which calls for e.g., the understanding of in-medium cascade of energetic particles. We will also discuss how this refined understanding affects the predictions based on conventional picture.

The exact WKB analysis as an analytic approach to preheating

• Seishi Enomoto (Yokohama National University)

Room: 435-437 Meeting Room Preheating is a crucial phase in the early universe where non-perturbative particle production occurs due to the oscillating backgroud field. While numerical methods have been widely used to study preheating dynamics, analytic approaches remain essential for gaining deeper theoretical insights and generalizing results across different models. In this talk, I will present the exact WKB analysis as a powerful analytical tool to investigate particle production during preheating.

Poster session (with coffee)

• Kamil Mudrunka (Tohoku University)
• Tenta Tsuji (KEK)

Room: 435-437 Meeting Room Reheating Process after Axion Inflation - Tenta Tsuji High frequency gravitational waves from Gauss-Bonnet inflation - Kamil Mudrunka

Reheating after Inflation: Characteristics and Constraints

• Pankaj Saha (KEK)

Room: 435-437 Meeting Room Reheating, the period following inflation, marks the transition where the inflaton decays, populating the early universe with matter and radiation. This phase remains relatively unexplored due to the absence of direct observational evidence and the complex, non-linear dynamics involved. This talk will examine the characteristics and constraints of the reheating phase. As reheating typically unfolds in multiple stages, I will describe the general features of the stages, drawing on some results from lattice simulations. I will describe how the reheating phase can be linked to Cosmic Microwave Background (CMB) observables via its Gravitational Waves signature, Finally, I will show how even subtle features in the inflationary potential at very small scales can significantly alter the dynamics of reheating and its potential observable signatures.

Panel discussion

• Pankaj Saha (KEK)
• Seishi Enomoto
• Naoya Kitajima (Tohoku University)
• Tom Giblin (Kenyon College)

Room: 435-437 Meeting Room

Theory Session

• Tom Giblin (Kenyon College)

Room: 445-447 Meeting Room

Practical Session

• Tom Giblin

Room: 445-447 Meeting Room