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Archive for the ‘cosmology’ category: Page 357

Oct 14, 2016

Before the Big Bang there was another universe and a new one will emerge after ours collapses

Posted by in categories: cosmology, physics

In their study, published on the pre-print server arxiv.org, Maha Salah, Fayçal Hammad, Mir Faizal and Ahmed Farag Ali have been able to look at the state of the universe before its beginning, creating a model of pre-Big Bang cosmology.

The cosmology of the universe can be modelled using the Einstein’s general theory of relativity. It predicts that the universe is expanding and the galaxies are all moving away from us. Also the further a galaxy is away, the faster it is moving away from us. This is used to predict the universe started with a Big Bang – if you reverse this expansion to go back in time, eventually we come to the point where the universe began.

At the point of Big Bang the laws of Einstein’s general theory of relativity seem to break down and it is not possible to use them to understand how the Big Bang occurred. So, how did the Big Bang happen and can we describe physics before the Big Bang? Can we describe physics before the creation of the universe? According to the team’s model, yes, we can.

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Oct 13, 2016

Hubble: Observable universe holds ten times more galaxies than previously thought

Posted by in category: cosmology

Not 100 billion galaxies but one trillion. Is this the missing mass then? No more “dark matter”?


The latest finding with the Hubble space telescope:

Observable Universe contains ten times more galaxies than previously thought

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Oct 11, 2016

Quantum Information Processing Near Spinning Black Holes

Posted by in categories: cosmology, quantum physics

Spinning black holes are capable of complex quantum information processes encoded in the X-ray photons.

The black holes sparked the public imagination for almost 100 years. Their presence in the universe has been long debated; however, the detection of X-ray radiation coming from the center of the galaxies, a feature of black holes, has put an end to the discussion and undoubtedly proven their existence.

The vast majority, if not all, of the known black holes were unveiled by detecting the X-ray radiation emitted by the stellar material accreting around them. Accretion disks emit X-ray radiation, light with high energy, due to the extreme gravity in the vicinity of black holes. X-ray photons emitted near rotating black holes not only exposed the existence of these phantom-like astrophysical bodies, but also seem to carry hidden quantum messages.

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Oct 2, 2016

Dark energy: Staring into darkness : Nature : Nature Research

Posted by in category: cosmology

The path to understanding dark energy begins with a single question: has it always been the same throughout the history of the Universe?

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Sep 30, 2016

After Big Bang, shock waves rocked newborn universe

Posted by in category: cosmology

Shock waves in the early universe could explain the generation of magnetic fields and the predominance of matter over antimatter.

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Sep 20, 2016

Physicists Made a ‘Black Hole’ in a Lab That May Finally Prove Hawking Radiation Exists

Posted by in categories: cosmology, information science, particle physics

Scientists may have found signs that phonons, the very small packets of energy that make up sound waves, were leaking out of sonic black holes, just as Hawking’s equations predicted.

Some 42 years ago, renowned theoretical physicist Stephen Hawking proposed that not everything that comes in contact with a black hole succumbs to its unfathomable nothingness. Tiny particles of light (photons) are sometimes ejected back out, robbing the black hole of an infinitesimal amount of energy, and this gradual loss of mass over time means every black hole eventually evaporates out of existence.

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Sep 17, 2016

This physicist says consciousness could be a new state of matter

Posted by in categories: cosmology, neuroscience, physics

Consciousness isn’t something scientists like to talk about much. You can’t see it, you can’t touch it, and despite the best efforts of certain researchers, you can’t quantify it. And in science, if you can’t measure something, you’re going to have a tough time explaining it.

But consciousness exists, and it’s one of the most fundamental aspects of what makes us human. And just like dark matter and dark energy have been used to fill some otherwise gaping holes in the standard model of physics, researchers have also proposed that it’s possible to consider consciousness as a new state of matter.

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Sep 14, 2016

Quantum information encoded in spinning black holes

Posted by in categories: computing, cosmology, quantum physics

Rotating black holes can implement quantum gates and quantum circuits, like Bell states, which are quantum counterparts of the classical computer programing.


The black holes sparked the public imagination for almost 100 years. Their presence in the universe has been debated for long; however, the detection of X-ray radiation coming from the center of the galaxies has put an end to the discussion and undoubtedly proven their existence.

The vast majority, if not all, of the known black holes were unveiled by detecting the X-ray radiation emitted by the stellar material around them. Black holes emit X-ray radiation, light with high energy, due to the extreme gravity in their vicinity. X-ray photons emitted near rotating black holes not only exposed the existence of these phantom-like astrophysical bodies, but also seem to carry hidden quantum messages.

Continue reading “Quantum information encoded in spinning black holes” »

Sep 14, 2016

Synopsis: Spotting Dark Matter with Supermaterials

Posted by in categories: cosmology, particle physics

Superconducting aluminum or superfluid helium could be used to detect superlight dark matter particles.

Dark matter searches repeatedly draw a blank. One possible reason for the failure may be dark matter’s mass: Despite increased sensitivity, current detectors cannot spot the particles that make up this elusive matter if the particles are extremely light. Now Kathryn Zurek from the Lawrence Berkeley National Laboratory, California, and colleagues have come up with two new ideas for making detectors that should be capable of spotting such superlight particles.

In broad strokes, dark matter detectors are designed to operate as follows: Incoming dark matter particles strike the detector, gently nudging nearby atomic nuclei or electrons in the material from which the detector is made. These rare nudges generate small amounts of energy in the form of light or heat, which the detector registers. But the ability to detect particles of a certain mass depends on the properties of the detector material, such as the mass of its nuclei. Current detectors, made from semiconducting materials or liquid xenon, are sensitive only to particles heavier than about 10 million electronvolts.

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Sep 13, 2016

Quantum Cosmology and the Evolution of Inflationary Spectra [CL]

Posted by in categories: cosmology, evolution, information science, quantum physics

We illustrate how it is possible to calculate the quantum gravitational effects on the spectra of primordial scalar/tensor perturbations starting from the canonical, Wheeler-De Witt, approach to quantum cosmology. The composite matter-gravity system is analysed through a Born-Oppenheimer approach in which gravitation is associated with the heavy degrees of freedom and matter (here represented by a scalar field) with the light ones. Once the independent degrees of freedom are identified the system is canonically quantised. The differential equation governing the dynamics of the primordial spectra with its quantum-gravitational corrections is then obtained and is applied to diverse inflationary evolutions. Finally, the analytical results are compared to observations through a Monte Carlo Markov Chain technique and an estimate of the free parameters of our approach is finally presented and the results obtained are compared with previous ones.

Read this paper on arXiv…

A. Kamenshchik, A. Tronconi and G. Venturi Tue, 13 Sep 16 11/91.

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