Intensive Lecture : Inflationary universe and cosmological perturbations

Aug 4, 2026, 10:00 AM → Aug 7, 2026, 3:00 PM Asia/Seoul

352 (Science Hall)

Part I: Background and Inflation
We start from homogeneous and isotropic cosmology, identify the conceptual problems of the standard hot big-bang model, and introduce inflation as a dynamical mechanism that solves them.

Part II: Linear Perturbation Theory
We develop the perturbative framework: metric perturbations, gauge transformations, matter perturbations, and gauge-invariant curvature perturbations. The goal is to understand what quantity is physically meaningful and conserved.

Part III: Superhorizon Evolution
We introduce the separate universe approach and delta N formalism.

Part IV: Primordial Power Spectra
We define the power spectrum, discuss scalar and tensor perturbations, and derive the primordial spectra from quantum fluctuations during inflation.

Tue, August 4

10:00 AM → 11:30 AM Lecture

1:00 PM → 2:30 PM Lecture

3:00 PM → 4:30 PM Lecture

Wed, August 5

10:00 AM → 11:30 AM Lecture

1:00 PM → 2:30 PM Lecture

3:00 PM → 4:30 PM Lecture

Thu, August 6

10:00 AM → 11:30 AM Lecture

1:00 PM → 2:30 PM Lecture

3:00 PM → 4:30 PM Lecture

Fri, August 7

10:00 AM → 11:30 AM Lecture

1:00 PM → 3:00 PM Free discussion / Adjourn