Cientistas encontram universo multidimensional no cérebro

É um grande esforço de imaginação tentar compreender o mundo em quatro dimensões para muitas pessoas, mas um novo estudo descobriu estruturas no cérebro com até onze dimensões – trabalho inovador que está começando a revelar segredos profundos da arquitetura do cérebro.

Usando topologia algébrica de uma forma que nunca foi usada antes na neurociência, a equipe do Blue Brain Project descobriu um universo de estruturas geométricas multidimensionais e espaços dentro das redes do cérebro.

A pesquisa, publicada na Frontiers in Computational Neuroscience, mostra que essas estruturas emergem quando um grupo de neurônios formam uma panelinha: cada neurônio se conecta à todos os outros neurônios do grupo de uma forma muito específica, que gera um objeto geométrico preciso. Quanto mais neurônios há em uma panelinha, maior é a dimensão do objeto geométrico.

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Professor: Electrons and Quarks May Experience Consciousness

“What this offers us is a beautifully simple, elegant way of integrating consciousness into our scientific worldview…”

The only reason humans know about the existence of consciousness — the phenomenon of having subjective feelings and experiences — is because we have feelings and experiences.

But despite centuries of study, scientists have yet to make any major progress in understanding consciousness.

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Physicists puzzled by strange numbers that could explain reality

 

Eight-dimensional octonions may hold the clues to solve fundamental mysteries.

  • Physicists discover complex numbers called octonions that work in 8 dimensions.
  • The numbers have been found linked to fundamental forces of reality.
  • Understanding octonions can lead to a new model of physics.

Is our reality, including its forces and particles, based on the strange properties of numbers with eight dimensions called “octonions“? A physicist thinks so, having found a way to expand 40-year-old research to reach surprising new directions.

First, a brief history of numbers.

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The universe may be conscious, say prominent scientists

 

A proto-consciousness field theory could replace the theory of dark matter, one physicist states. 

What consciousness is and where it emanates from has stymied great minds in societies across the globe since the dawn of speculation. In today’s world, it’s a realm tackled more and more by physicists, cognitive scientists, and neuroscientists. There are a few prevailing theories. The first is materialism. This is the notion that consciousness emanates from matter, in our case, by the firing of neurons inside the brain.

Take the brain out of the equation and consciousness doesn’t exist at all. Traditionally, scientists have been stalwart materialists. But doing so has caused them to slam up against the limitations of materialism. Consider the chasm between relativity and quantum mechanics, or Heisenberg’s uncertainty principle, and you quickly start to recognize these incongruities.

The second theory is mind-body dualism. This is perhaps more often recognized in religion or spirituality. Here, consciousness is separate from matter. It is a part of another aspect of the individual, which in religious terms we might call the soul. Then there’s a third option which is gaining ground in some scientific circles, panpsychism. In this view, the entire universe is inhabited by consciousness.

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Infinity Is a Beautiful Concept – And It’s Ruining Physics

I was seduced by infinity at an early age. Georg Cantor’s diagonality proof that some infinities are bigger than others mesmerized me, and his infinite hierarchy of infinities blew my mind. The assumption that something truly infinite exists in nature underlies every physics course I’ve ever taught at MIT—and, indeed, all of modern physics. But it’s an untested assumption, which begs the question: Is it actually true?

A Crisis in Physics

There are in fact two separate assumptions: “infinitely big” and “infinitely small.” By infinitely big, I mean that space can have infinite volume, that time can continue forever, and that there can be infinitely many physical objects. By infinitely small, I mean the continuum—the idea that even a liter of space contains an infinite number of points, that space can be stretched out indefinitely without anything bad happening, and that there are quantities in nature that can vary continuously.

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Physicists puzzled by strange numbers that could explain reality

Eight-dimensional octonions may hold the clues to solve fundamental mysteries.

 

  • Physicists discover complex numbers called octonions that work in 8 dimensions.
  • The numbers have been found linked to fundamental forces of reality.
  • Understanding octonions can lead to a new model of physics.

Is our reality, including its forces and particles, based on the strange properties of numbers with eight dimensions called “octonions“? A physicist thinks so, having found a way to expand 40-year-old research to reach surprising new directions.

First, a brief history of numbers.

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Physicists Finally Observe a Link Between Quantum Criticality And Entanglement

We know that the realm of quantum physics is science operating at a mind-bogglingly small scale, thus watching quantum interactions happen is always exciting. Now, physicists have managed to observe billions upon billions of entangled electrons passing through a metal film.

The film is a mix of ytterbium, rhodium and silicon, and is what’s known as a ‘strange metal’, one that doesn’t act as expected at very low temperatures.

“With strange metals, there is an unusual connection between electrical resistance and temperature,” explained physicist Silke Bühler-Paschen from Vienna University of Technology in Austria.

“In contrast to simple metals such as copper or gold, this does not seem to be due to the thermal movement of the atoms, but to quantum fluctuations at the absolute zero temperature.”

These fluctuations represent a quantum criticality – that point between quantum states which are the equivalent of transition between liquids, solids and gases in classical physics; the team says this cascade of electrons is the best evidence yet of a link between quantum criticality and entanglement.

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The hunt for the ‘angel particle’ continues

A 2017 report of the discovery of a particular kind of Majorana fermion — the chiral Majorana fermion, referred to as the “angel particle” — is likely a false alarm, according to new research. Majorana fermions are enigmatic particles that act as their own antiparticle and were first hypothesized to exist in 1937. They are of immense interest to physicists because their unique properties could allow them to be used in the construction of a topological quantum computer.

A team of physicists at Penn State and the University of Wurzburg in Germany led by Cui-Zu Chang, an assistant professor of physics at Penn State studied over three dozen devices similar to the one used to produce the angel particle in the 2017 report. They found that the feature that was claimed to be the manifestation of the angel particle was unlikely to be induced by the existence of the angel particle. A paper describing the research appears on January 3, 2020 in the journal Science.

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