Wednesday, 17 October, 2018

Hawking's final work on 'black hole entropy' published

Stephen Hawking's last scientific paper has been released Stephen Hawking's last scientific paper has been released
Elijah Vega | 13 October, 2018, 18:28

The study was groundbreaking revealing that even Hawking's original argument was flawed in some way and most importantly that no-hair black hole theories were unfounded.

The physicists show in their paper that a black hole's entropy may be recorded by photons that surround the black hole's event horizon, the point at which light can not escape the intense gravitational pull. Now, the modern genius' final scientific paper has been completed and posted online by his colleagues for the world to revel in.

The revelation led to physicists scrambling for 40 years for a solution to what was referred to as the black-hole information paradox.

Changes in a black hole's temperature and entropy, or disorder, can preserve some of an object's information upon black hole consumption.

Scientists believe nothing can really escape a black hole, and in the 1970s, Hawking suggested that black holes could have temperatures of their own and could even leak quantum particles. These hairs surround the event horizon of a black hole, but how would they work?

Professor Perry, who works in theoretical physics at Cambridge, told the Guardian, "what this paper does is show that "soft hair" can account for the entropy".

The eminent physicist Stephen Hawking, who past away previous year, was one of the world's foremost authorities on black holes.

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In the new paper, Hawking and his team found a mechanism - which relies on as-yet-unproven assumptions - for counting the amount of inormation that soft hairs can carry. This one was only the third in a series of papers which dealt with a concept that puzzled the great scientists for decades: the black hole information paradox. Where does all the information that a black hole swallowed in the form of celestial objects go?

Perry also recounts the last time he spoke to Stephen Hawking about the research they were both working on - it was only a few days before Hawking's death.

"It was very hard for Stephen to communicate and I was put on a loudspeaker to explain where we had got to".

There is still much unknown about how these soft hairs store information and whether they store all or only some of the information gobbled up by black holes.

The new paper seeks to address this information paradox. This "Hawking radiation" effect means that, eventually, the black hole will evaporate, leaving behind a vacuum that will look the same for each evaporated black hole, no matter what it ate during its lifetime.

"We think it's a pretty good step, but there is a lot more work to be done".

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