Where did the energy come from before the Big Bang?

Where did the energy come from before the Big Bang?

The key assumption of this model is that just before the Big Bang, space was filled with an unstable form of energy, whose nature is not yet known. At some instant, this energy was transformed into the fundamental particles from which arose all the matter we observe today. That instant marks what we call the Big Bang.

Where did quantum fields come from?

Quantum fields come about when you’re observing quantum phenomena, like the energy of an electron, at every point in space and time.

Did quantum fields exist before the universe?

The fact that we’ve observed these fluctuations and their consequences tell us, quite definitively, that those quantum fields did exist during inflation. But whatever occurred in our Universe prior to the final tiny fraction-of-a-second of inflation can never be observed or accessed from within our observable Universe.

What came before Big Bang?

The initial singularity is a singularity predicted by some models of the Big Bang theory to have existed before the Big Bang and thought to have contained all the energy and spacetime of the Universe.

Where did energy first come from?

Energy has been around since the dawn of time. The first source of energy was the sun, as it provided heat and light during the day. People rose and slept with the light, relied on wood and dung burning for heat, and water power to generate basic mills.

Where did the energy to create the universe come from?

But at the birth of the Universe – that is, everything – the energy needed for the Big Bang must have come from somewhere. Many cosmologists think its origin lies in so-called quantum uncertainty, which is known to allow energy to emerge literally from nowhere.

When did quantum field theory start?

1920s
Quantum field theory emerged from the work of generations of theoretical physicists spanning much of the 20th century. Its development began in the 1920s with the description of interactions between light and electrons, culminating in the first quantum field theory—quantum electrodynamics.

Is the universe made of fields?

Most physicists have concluded that the universe, all space, time, and matter, is made of fields. As far as we know these fields have no smallest, indivisible constituent. Another Greek, Democritus, however, suggested that matter was made of tiny, indivisible particles called atoms.

Where did all the energy come from in the universe?

The energy in the atoms came from the nuclear reactions in the heart of the Sun. What started the nuclear reactions? Physicists think the Big Bang did. So the short answer is that the energy we encounter and use everyday has always been with us since the beginning of the universe and always will be with us.

Who created the quantum field theory?

In particle physics, the history of quantum field theory starts with its creation by Paul Dirac, when he attempted to quantize the electromagnetic field in the late 1920s. Major advances in the theory were made in the 1940s and 1950s, and led to the introduction of renormalized quantum electrodynamics (QED).

What happened to the quantum field theory?

The quantum field theory was ultimately invalid too early after the Big Bang, for a short time, and had to be replaced by string theory whose basic blocks aren’t quantum fields, at least not when you calculate it exactly.$\\endgroup$ – Luboš Motl Dec 9 ’12 at 5:59

Do quantum fields exist in space?

These quantum fields really do exist all throughout space, and experiments not only show that they do exist, but show us the magnitude of their effects as well. but can be calculated in principle if we had an arbitrary amount of computational power.

Did space and time exist before the Big Bang?

The statement that space and time did not exist prior to the Big Bang appears to present a logical impossibility, at least with respect to time. Any physical event implies change, and change presupposes — or would logically require — the existence of time. Or not?

What is the Big Bang theory?

This is the Big Bang theory. A universe popping into existence out of nothing is so bonkers that scientists had to be dragged kicking and screaming to the idea. But the evidence is compelling. The galaxies are flying apart like pieces of cosmic shrapnel. And the heat of the Big Bang is still around us.