what is the essence of discovery

When you sit on the swing and want to swing harder, you start moving your legs back and forth. You quickly find the right rhythm to do the swing at the right moment. This particular type of phenomenon is known in physics as: parametric resonance. When your feet move at the system’s resonant frequency, they can transfer energy to the system and cause the oscillation to go higher.

This kind of resonance happens everywhere, and a group of researchers found that: An exotic form of parametric resonance may have emerged very early in the universe.

Perhaps one of the most important phenomena in the entire history of the universe was inflation. This is a hypothetical event that occurred when our universe was less than a second. During inflation, the cosmos expanded to enormous dimensions and became many times larger. The end of inflation must have been very chaotic, as gravitational waves bounced off in all directions throughout space.

Gravitational waves are usually extremely weak. To detect gravitational waves traveling through the Earth, it was necessary to make detectors that could measure oscillations smaller than the width of an atomic nucleus. However, researchers note that in the very early stages of the universe, these gravitational waves can be very strong. Where they were strongest, waves could provide an extraordinary amount of energy.

The study’s authors calculated that this could have serious consequences for the electromagnetic field that existed at that time in the early universe. Regions of intense gravity can excite the electromagnetic field enough to create light by releasing some of its energy as radiation.

This result leads to a completely new phenomenon: light is produced solely by gravity. There’s no way this could happen in the modern universe, but physicists have shown that the early universe is a much stranger place than you might imagine.