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Can we extract energy from a black hole? Scientists propose a new plan

For decades, scientists have battled the complex mystery of physics: Has the enormous amount of energy produced by the spinning black hole ever been touched by human hands?

If future societies can pull off this magnificent success, it appears that the power supply of distant galactic civilizations can be assured – and scientists now have a new explanation for that extraction that one day. How is it possible?

“Black holes are often surrounded by hot ‘soup’ plasma particles that have a magnetic field,” explains an astrophysicist Luca Comisso at Columbia University.

“Our theory shows that when the magnetic field lines are properly disconnected and reconnected, they can accelerate the plasma particles to negative energy and extract large amounts of black hole energy.”


Comisso’s new work, co-authored by physicist Felipe A.Asenjo of the Universidad Adolfo Ibáñez in Chile, provides a new prism image to see how energy extraction from a rotating black hole can work.

Considering the large mass, it is natural to assume that a black hole has a large amount of energy. Unfortunately, everything is locked at the bottom of the slippery spacetime.

Under the conditions of the mass spinning, it may be possible to dip the toes into this great energy pool while the spacetime slope is dragged along.

Physicist and mathematician at Emminent University of Oxford Roger Penrose suggests an ingenious approach. In what is known as the penrose process, energy could theoretically be extracted from a region outside the black hole event horizon called the ergosphere, where the spacetime is distorted around as a result of Black hole rotation

Penrose’s calculations suggest that if a particle splits into two within the ergosphere, with one fragment falling into the event horizon and the other escaping from the black hole’s gravitational pull, the energy obtained from The escaped objects would theoretically be pulled if this was practically impossible.

This famous idea was reviewed by scientists in a paper published a few months ago. But it’s not the only suggested way to harness the energy of spinning black holes.

Hawking radiation, based on quantum mechanical emission, is another method, like the so-called Blandford-Znajek process, in which energy may be electromagnetically drawn through the field. Magnet around a black hole

In Comisso and Asenjo’s analysis, magnetism also played an important role, especially when the magnetic field lines broke and re-entered the ergosphere – but it was also reminiscent of the penrose process.

When magnetic coupling occurs outside the event horizon, the ruptured plasma particles accelerate closer to the speed of light in two different directions, one plasma flow may fall into the event horizon, where the other. One will escape

From the perspective of a black hole, the falling particles are absorbed by negative energy. From the outside of the black hole, the particles emitted have positive energy that can be activated.

In this way, escaping the plasma stream with its theoretically filled energy can serve as a limitless source of free energy as long as the black hole continues to devour the negative energy plasma, that is.

“We calculated that the plasma power process could achieve efficiency up to 150 percent, higher than any power plant operating on Earth,” Asenjo explains.

“Achieving greater than 100 percent efficiency is possible because black holes leak energy, which is supplied to the plasma escaping from the black hole free of charge.”

Although it may not be possible that we will be able to take advantage of this power generation in practice. But that doesn’t mean it’s completely useless.

From an astronomical point of view, this phenomenon could be what caused the explosion of a black hole, representing the emission of massive amounts of radiation energy not used in space.

“Unlike the Blandford-Znajek process in which the extraction of rotational energy is obtained through a purely electromagnetic mechanism, the energy extraction mechanism described here requires a non-zero particle inertia.” The author wrote

“This mechanism is also different from the original penrose process, because the distribution of magnetic energy is needed to generate negative energy particles. Obviously, the whole mechanism draws the black hole’s spin energy by feeding the black hole with negative energy and momentum. angular”

The findings are reported in Physical review.

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