inflation

cosmogony

Also known as: inflationary universe

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June 29, 2026

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Cosmogony is the study of the universe's evolution and its characteristics. A key concept in modern cosmogony is cosmic inflation, a theory proposing that the universe underwent an exponential expansion in its earliest moments. This rapid inflation, driven by a "false vacuum" state, smoothed out initial spatial curvature and diluted exotic particles like magnetic monopoles.12

Inflation explains the universe's large-scale isotropy and provides a mechanism for the origin of cosmic microwave background anisotropies through quantum fluctuations. While the big bang model, augmented by inflation, is the prevailing cosmological theory, alternative ideas like the steady-state theory have been proposed and largely disproven by observations such as the cosmic microwave background radiation.234

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cosmic microwave background
Isotropy in the cosmic background
A mechanism called “inflation” offers an attractive way out of this dilemma. The basic idea is that at high energies, matter is better described by fields than by classical means. The contribution of a field to the energy density (and therefore the mass density) and the pressure of…
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A mechanism called “inflation” offers an attractive way out of this dilemma. The basic idea is that at high energies, matter is better described by fields than by classical means. The contribution of a field to the energy density (and therefore the mass density) and the pressure of…
Read More

cosmology
Inflation
One of the more enduring contributions of particle physics to cosmology is the prediction of inflation by the American physicist Alan Guth and others. The basic idea is that at high energies matter is better described by fields than by classical means. The contribution…
Read More
One of the more enduring contributions of particle physics to cosmology is the prediction of inflation by the American physicist Alan Guth and others. The basic idea is that at high energies matter is better described by fields than by classical means. The contribution…
Read More