Black Hole Created In Lab Confirms Stephen Hawking's Prediction

The Hawking theory that the team says its experiment verifies is called Hawking radiation. One region of the fluid travels at a supersonic speed and a connected region travels at a subsonic speed; sizes of grey arrows indicate speed. In one of the atoms moving with subsonic, the other supersonic speed.

So far, astronomers have obviously not been able to get close enough to a black hole in order to prove this or disprove the theory.

This is the second experiment from Technion demonstrating Hawking radiation in this fashion. However, the thermality should be limited by greybody factors, at the very least.

Steinhauer reasoned that his analogue system should also emit the equivalent of Hawking radiation, complete with entangled phonons.

However, classical white-hole analogues have been investigated experimentally.

The renowned physicist Stephen Hawking passed away past year, but his groundbreaking work lives on.

Gizmodo details the subject, and the online publication explains that this black hole that experts created in their lab is not like the black holes that we can find out there in space where gravity establishes a region of spacetime that's so warped that light cannot escape.

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Hawking's prediction has enormous implications for theoretical physics, most notably for the black hole information paradox, but it's proven extremely hard to test experimentally.

This black hole isn't like the black holes out in space, where gravity creates a region of spacetime so warped that light can't escape. Still, it's an important verification of Hawking's work. By adjusting the energy from focused laser beams, one side of the condensate is made denser than the other side. Bose-Einstein condensates are systems of ultra-cold atoms where odd quantum physical phenomena become more visible on larger scales. He predicted that when quantum mechanics are considered, black holes actually emit a tiny stream of thermal radiation at a temperature that depends on their mass. Normally, those particles immediately annihilate one another. If this process occurs near an event horizon, the black hole's overwhelmingly powerful gravitational force could pull apart the pair of particles and prevent them from destroying each other. "Nobody has done such an experiment before".

The experiment also reveals one interesting feature of the black hole- outside the black hole, light can either move away from or into the black hole. But once inside the black hole, it can not escape.

When the researchers measured the sound waves or phonons that escaped and the ones that fell into the black hole, they found it had an estimated temperature of 0.35 billionths of a Kelvin, which is consistent with Hawking's theories, according to Science News. "Hawking radiation therefore produces a tiny signal, and it would seem that the phenomenon can not be verified through observation".

Scientists constructed this analogue black hole with improvements compared with their previous set up such as reduced magnetic field noise, enhanced mechanical and thermal stability and redesigned optics. The team was able to measure the system's radiation, confirming that its temperature was determined only by the speed of sound and its flow.

Prof Steinhauer said of the research published in the journal Nature: "We found very good agreement with the predictions of Hawking's theory".

After measurement, the scientist came to the conclusion that the radiation of the hole is reminiscent of the Hawking radiation is true, with certain reservations.

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