Black hole information paradox

 Black hole information paradox may have been finally solved by researchers

Researchers propose that extra-dimensional spacetime torsion prevents black holes from fully evaporating, leaving remnants that preserve quantum information. In the 1970s, Stephen Hawking showed through semi-classical calculations that black holes are not completely black. Instead, they emit a faint form of radiation which slowly drains their energy until they eventually disappear. This creates a serious conflict with quantum mechanics because it appears to destroy information permanently, violating the principle of unitarity. According to quantum physics, information cannot be erased, yet black hole evaporation seems to do exactly that. A new theoretical study suggests that black holes may never completely disappear, potentially offering a way to resolve the long-standing black hole information paradox.

One of the biggest unsolved problems in modern physics, known as the “black hole information paradox,” may finally have a compelling solution. The proposed answer could also help explain where the mass of fundamental particles comes from. Researchers have proposed that black holes stop evaporating at the last moment, leaving behind tiny remnants which preserve all the information they contain. The same seven-dimensional geometry behind this idea could also help explain why elementary particles have mass. A new study, led by Richard Pinčák’s team, introduces a possible solution based on the geometry of extra-dimensional space. In the study, the researchers examined the effects of a gravity model called Einstein-Cartan theory in a seven-dimensional framework built on a mathematical structure known as a G2-manifold with torsion. Unlike standard general relativity, this theory allows spacetime not only to bend but also to “twist” through a property called spacetime torsion. Theory suggests black holes may secretly preserve information, and could even reveal the origin of mass itself. 

For decades, physicists have wrestled with one of the deepest puzzles in modern science: the "black hole information paradox." The model produces an intriguing result. At the extreme densities associated with the Planck scale, this torsion creates a repulsive force which opposes gravitational collapse and stops the final stage of Hawking evaporation. Instead of disappearing completely, the black hole leaves behind a stable “remnant” with a predicted mass of about 9*10-41 kg. The paradox traces back to work by Stephen Hawking in the 1970s. Using semi-classical calculations, Hawking showed that black holes are not completely black. Instead, they emit a faint form of radiation that slowly drains their energy, causing them to shrink and eventually disappear. The result created a serious problem. According to quantum mechanics, information cannot be destroyed. Yet if a black hole evaporates completely, all information about the matter that fell into it appears to vanish as well. This apparent contradiction became known as the black hole information paradox. Study led by Richard Pinčák and published in General Relativity and Gravitation proposes a different outcome. The researchers suggest that the answer may lie in the geometry of a higher dimensional universe.

Unifying black hole stability and elementary particle mass via 7D geometry. Geometric torsion generates a repulsive force at Planck densities (central inset), stabilizing a black hole remnant. Through dimensional reduction, the torsion vacuum expectation value is identified with the electroweak scale (≈246 GeV), naturally providing the Higgs field vacuum expectation value (VEV) and enabling elementary particles to acquire mass in 4D spacetime. The team investigated a version of gravity known as Einstein-Cartan theory, formulated in 7 dimensions on a mathematical structure called a G2-manifold with torsion. Unlike Einstein's General Relativity, which describes spacetime as something which can bend or curve, Einstein-Cartan theory also allows spacetime to twist. This twisting is known as spacetime torsion. According to the model, torsion becomes especially important at the extreme densities associated with the Planck scale. Under those conditions, it generates a repulsive force which works against gravitational collapse. The researchers found that this repulsive effect can stop the final stage of Hawking evaporation. Rather than disappearing completely, a black hole would leave behind a stable "remnant" with a predicted mass of about 9*10-41 kg.

If a black hole never fully vanishes, the question becomes, what happens to the information carried by everything that fell into it? The researchers suggest that the stable remnant functions as a kind of memory archive. Its structure provides a physical mechanism for preserving information through a spectrum of “quasi-normal modes.”  More specifically, quantum information becomes encoded within long lived "vibrations" of the torsion field that exist inside the remnant's geometry. Their calculations suggest that a remnant left behind by a black hole with the mass of the Sun could store approximately 1.515*1077 qubits of information. According to the researchers, this capacity is exactly sufficient to preserve the information needed to resolve the paradox. The study also has major implications for particle physics. The researchers found that reducing the geometry from seven dimensions to four dimensions, which corresponds to observable spacetime, naturally produces the electroweak scale (~246 GeV). This scale is closely tied to the Higgs field, which gives elementary particles their mass.

Within this framework, the vacuum expectation value (VEV) of the torsion field is dynamically linked to the electroweak scale (about 246 GeV). In other words, the same geometric effect that prevents black holes from fully evaporating and preserves information could also provide a geometric explanation for the mass hierarchy problem in particle physics. The study also reaches beyond black holes and into particle physics. As a result, the same geometric mechanism that prevents black holes from completely evaporating and preserves quantum information could also provide a geometric explanation for the mass hierarchy problem, one of the long standing challenges in particle physics. If extra dimensions play such a fundamental role, why have scientists not observed them directly? According to the study, the particles linked to these dimensions (Kaluza-Klein excitations) would have masses of roughly 8.6*1015 GeV. This energy scale is about seven orders of magnitude beyond what the Large Hadron Collider (LHC) can reach. However, the authors emphasize that being beyond the reach of current particle accelerators does not make the theory impossible to test. Because the framework is built on specific geometric relationships, it produces concrete predictions that could potentially be investigated through astronomical observations. One possibility involves the stable black hole remnants themselves. The predicted remnants (9*10-41 kg) could contribute to Dark Matter. Detecting the gravitational effects of these proposed "Planckian relics" would provide direct support for the theory.

The model also stands out because of the mathematical structure behind the information stored in the remnants’ “vibrations” (quasi-normal modes). In addition, the enormous energy scales involved are associated with the very early universe. This means traces of this seven-dimensional geometry could potentially appear in the cosmic microwave background or in primordial gravitational waves. By linking black holes to the Higgs field, the research suggests that solving the information paradox may not require rewriting quantum mechanics. Instead, it points toward a deeper seven-dimensional picture of the structure of reality. In addition, the extremely high energy scales involved are characteristic of the early universe. By connecting black holes, quantum information, extra dimensions, and the Higgs field within a single framework, the study offers an ambitious attempt to address multiple outstanding problems in physics. If the idea proves correct, the black hole information paradox may not require a revision of quantum mechanics after all. Instead, it could point toward a deeper understanding of reality rooted in a 7-dimensional structure of space time.

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Uranus Mission Concept CASMIUS

 To probe ice giant secrets, it is finally getting the attention by Scientists

Scientists want to send a mission called Uranus Orbiter and Probe, a spacecraft that would travel all the way to Uranus, drop a probe into its atmosphere, and then stay behind in orbit to study the planet, its rings, moons, magnetic field and what’s going on deep inside. The ice giant Uranus is one of the most fascinating objects in the solar system, with its sideways rotation, intricate ring system and unique family of moons. However, it is also one of the least explored objects in the solar system, owing to its extreme distance from the Sun. With NASA’s Voyager 2 spacecraft remaining as the only spacecraft to visit Uranus, scientists continue to design and envision mission concepts for returning to explore Uranus and its icy secrets.

Why Uranus? Because we’ve barely seen it up close. The only spacecraft to visit it, was Voyager 2 in 1986, and that was just a quick flyby. Since then, Uranus has remained one of the Solar System’s biggest mysteries. And it’s a weird one with following attributes:-

 it spins almost on its side

 it’s one of the coldest planets in the Solar System

 diamonds rain down on Uranus’ core

 and its magnetic field is exceptionally chaotic, tilted and lopsided

A lone researcher from might be one step closer to sending a mission back to Uranus, as they propose the CASMIUS (Coupled AtmosphereS and Magnetosphere Interactions of the Uranus System) in a study presented at the Lunar and Planetary Science Conference. For the study, Dr. Hadi Madanian, who is a Research Scientist and founder of Earth and Planetary Exploration Sciences LLC (Epex Scientific), discusses how the CASMIUS mission concept could help unveil new insights into Uranus, including its interior composition, magnetic field structure and composition of Uranus’ rings and many moons. This mission could help scientists understand not only Uranus itself, but also a whole class of planets called ice giants, which may be common around other stars, too.

The study notes, “Understanding the complexities of the Uranus system opens a new window to understanding the solar system formation, planetary dynamo, and exoplanet research. It also furthers our knowledge of our home planet in critical areas such as geomagnetism and dynamo and can provide insights into extreme events such as the magnetic dipole reversal. As such, a flagship class mission to Uranus is a monumental endeavor with enabling science across disciplines and consequential findings that extends beyond the current century.” While the study doesn’t mention whether CASMIUS will be an orbiter mission or flyby (like Voyager 2), it does recommend using two spacecraft with different instruments that “provide stand-alone experiments and complement the other spacecraft measurements.” The study does an excellent job outlining potential launch and flight timelines to reach Uranus, including a launch in mid-2033 which would take approximately 9-10 years, mid-2034 that would take approximately 8-10 years, mid-2035 that would also take approximately 8-10 years, and a 2036 mission that would take approximately 10 years. Each timeline was based on the spacecraft change in velocity, officially called delta-V.

NASA’s Voyager 2 continues to be the only spacecraft to visit Uranus and its family of moons, as the spacecraft made its famous flyby in late-January 1986, which consisted of collecting imagery and data from November 1985 to February 1986. Very little was known about Uranus and its moons prior to the Voyager 2 flyby, as images and data was limited to ground-based telescopes, revealing a blurry world due to its vast distance from Earth. As a result, Voyager 2 discovered 10 new moons, two new rings (there were nine known rings prior to the flyby), and measured Uranus’ sideways magnetic field. Scientists knew about Uranus’ sideways rotation since the mid-19th century, as astronomers observed how the moons orbited Uranus perpendicular to “normal” orbits. NASA really does want to go much deeper into Uranus. 

Aside from CASMIUS, there are currently a plethora of proposed missions to explore Uranus and its many moons, with NASA’s Uranus Orbiter & Probe (UOP) mission arguably being the most significant, as it was named a high priority “Flagship” mission by NASA’s “Origins, Worlds, and Life: A Decadal Strategy for Planetary Science and Astrobiology 2023-2032”, and will have an orbiter and atmospheric probe. Examples of other proposed missions include China’s Tianwen-4, which is slated to be a Jupiter orbiter and Uranus flyby; and the European Space Agency’s MUSE (Mission to Uranus for Science and Exploration) mission concept, which mirrors NASA’s UOP mission with an orbiter and atmospheric probe. How will CASMIUS potentially help explore Uranus and its ice giant secrets in the coming years and decades? Only time will tell, and we have to wait till any confirm results emerge for scientists to research further.

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