Inflation, String Theory and Cosmology

Understand

At its very beginning, the universe is believed to have grown exponentially in size via the mechanism of inflation.

• The almost scale-invariant density perturbation spectrum predicted by inflation is strongly supported by cosmological observations, in particular the cosmic microwave background radiation.
• However, the universe's precise inflationary scenario remains a profound problem for cosmology and for fundamental physics.
• String theory, the most-studied theory as the final physical theory of nature, should provide an answer to this question.