How long did inflation of the universe last?

In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. The inflationary epoch lasted from 10−36 seconds after the conjectured Big Bang singularity to some time between 10−33 and 10−32 seconds after the singularity.

How big was the universe during inflation?

According to this paper at the end of inflation the universe’s scale factor was about 10−30 smaller than it is today, so that would give a diameter for the currently observable universe at the end of inflation of 0.88 millimeters which is approximately the size of a grain of sand (See calculation at WolframAlpha).

What is the theory of inflation?

The Inflation Theory proposes a period of extremely rapid (exponential) expansion of the universe during its first few moments. It was developed around 1980 to explain several puzzles with the standard Big Bang theory, in which the universe expands relatively gradually throughout its history.

Who proposed eternal inflation theory?

Paul Steinhardt, one of the original researchers of the inflationary model, introduced the first example of eternal inflation in 1983, and Alexander Vilenkin showed that it is generic.

When was the first inflation?

Before the introduction of the U.S. Federal Reserve by the Federal Reserve Act in 1913, the U.S. economy grew in fits and starts. Severe shocks and panics followed periods of rapid inflation and growth in asset prices. Between 1775 and 1913, the United States experienced four separate periods of double-digit inflation.

What is inflation history?

Inflation is the decline of purchasing power of a given currency over time. A quantitative estimate of the rate at which the decline in purchasing power occurs can be reflected in the increase of an average price level of a basket of selected goods and services in an economy over some period of time.

How big was the early universe?

The Universe was once just the radius of the Earth-to-the-Sun, which happened when the Universe was about a trillionth (10-12) of a second old. The expansion rate of the Universe back then was 1029 times what it is today.

How far did the universe expand in the first second?

According to inflation theory, during the inflationary epoch about 10−32 of a second after the Big Bang, the universe suddenly expanded, and its volume increased by a factor of at least 1078 (an expansion of distance by a factor of at least 1026 in each of the three dimensions), equivalent to expanding an object 1 …

When did universe inflation?

The inflationary Universe According to the theory of inflation, the early Universe expanded exponentially fast for a fraction of a second after the Big Bang. Cosmologists introduced this idea in 1981 to solve several important problems in cosmology.

What are the 3 theories of inflation?

Read this article to learn about the three theories of inflation, i.e., (1) Demand Pull Inflation, (2) Cash Push Inflation, and (3) Mixed Demand Inflation.

When was the eternal inflation theory made?

1979
It’s based around a concept called eternal inflation, first introduced in 1979 and published in 1981. After the Big Bang, the Universe experienced a period of exponential inflation. Then it slowed down, and the energy converted into matter and radiation.

What caused inflation of the universe?

In our modern conception of cosmic inflation, that period of rapid, accelerated expansion is driven by a new character to join the cosmological cast: something called the inflaton. In this picture, the inflaton is a quantum field that permeates all of space and time.

What is an inflationary universe?

A model universe in which this rapid, early expansion occurs is called an inflationary universe. The inflationary universe is identical to the Big Bang universe for all time after the first 10 –30 second.

How long did inflation last?

Inflation ended at about 10−32 seconds after the big bang – that is when the universe was only 0.88mm. The 400000 years age is when the universe had expanded and cooled enough to become transparent – that is when the CMB photons started traveling towards us 13.7 billion years ago.

What is cosmic inflation in the Big Bang theory?

Cosmic Inflation. As we will see, the addition of inflation to the Big Bang model claimed to solve the horizon problem, as well as one or two other potential problems that had been identified with the standard Big Bang theory, such as the “flatness problem” (why the density of matter in the universe appears “fine-tuned”…

What is inflaton inflation?

In our modern conception of cosmic inflation, that period of rapid, accelerated expansion is driven by a new character to join the cosmological cast: something called the inflaton. Get it? The inflaton inflates. Not the most creative name, but there you go.