Archive for the ‘particle physics’ category

Sep 26, 2016

Lawrence Krauss Versus Freeman Dyson on Gravitons

Posted by in categories: alien life, engineering, genetics, particle physics, quantum physics, robotics/AI, space travel

Yesterday, in the New York Review of Books, Freeman Dyson analyzed a trio of recent books on humanity’s future in the larger cosmos. They were How to Make a Spaceship: A Band of Renegades, an Epic Space Race, and the Birth of Private Spaceflight; Beyond Earth: Our Path to a New Home in the Planets; and All These Worlds Are Yours: The Scientific Search for Alien Life.

Dyson is “a brilliant physicist and contrarian,” as the theoretical astrophysicist Lawrence Krauss recently told Nautilus. So I was waiting, as I read his review, to come across his profound and provocative pronouncement about these books, and it came soon enough: “None of them looks at space as a transforming force in the destiny of our species,” he writes. The books are limited in scope by looking at the future of space as a problem of engineering. Dyson has a grander vision. Future humans can seed remote environments with genetic instructions for countless new species. “The purpose is no longer to explore space with unmanned or manned missions, but to expand the domain of life from one small planet to the universe.”

Dyson can be just as final in his opinions on the destiny of scientific investigation. According to Krauss, Dyson once told him, “There’s no way we’re ever going to measure gravitons”—the supposed quantum particles underlying gravitational forces—“because there’s no terrestrial experiment that could ever measure a single graviton.” Dyson told Krauss that, in order to measure one, “you’d have to make the experiment so massive that it would actually collapse to form a black hole before you could make the measurement.” So, Dyson concluded, “There’s no way that we’ll know whether gravity is a quantum theory.”

Sep 26, 2016

Wonders of Creation: Scientists Use Quantum Mechanics to Teleport Particle 4 Miles

Posted by in categories: computing, particle physics, quantum physics

Scientists at the University of Calgary successfully teleported a particle nearly four miles away in a breakthrough experiment that could revolutionize the way computers function.

Researchers used the entanglement property of quantum mechanics, known as “spooky action at a distance,” to teleport a particle. It’s a scientific property not even the renowned Albert Einstein could come to terms with it.

“Being entangled means that the two photons that form an entangled pair have properties that are linked regardless of how far the two are separated,” Dr. Wolfgang Tittel, a physics professor at the University of Calgary who was involved in the research, said in a press statement. “When one of the photons was sent over to City Hall, it remained entangled with the photon that stayed at the University of Calgary. What happened is the instantaneous and disembodied transfer of the photon’s quantum state onto the remaining photon of the entangled pair, which is the one that remained six kilometres [slightly less than 4 miles] away at the university.”

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Sep 26, 2016

MIT: Powering up graphene implants without frying cells ~ For the Next Generation of Implants

Posted by in categories: biotech/medical, health, nanotechnology, particle physics

This computational illustration shows a graphene network structure below a layer of water.

Image: Zhao Qin

New analysis finds way to safely conduct heat from graphene to biological tissues.

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Sep 25, 2016

What if spacetime were a kind of fluid?

Posted by in categories: particle physics, quantum physics

This is the question tackled by theoretical physicists working on quantum gravity by creating models attempting to reconcile gravity and quantum mechanics.

Some of these models predict that spacetime at the Planck scale (10^-33cm) is no longer continuous — as held by classical physics — but discrete in nature.

Just like the solids or fluids we come into contact with every day, which can be seen as made up of atoms and molecules when observed at sufficient resolution. A structure of this kind generally implies, at very high energies, violations of Einstein’s special relativity (a integral part of general relativity).

Sep 22, 2016

Femtotechnology: A technology that is Beyond Nanotechnology

Posted by in categories: evolution, nanotechnology, particle physics, robotics/AI

Nanotechnology has reshaped the technological discoveries in the recent times. Nanotechnology has enabled the creation and invention of numerous things with wide potentialities. Every field is subject to constant evolution, nanotechnology is no exception. Researchers and scientists who are engaged with nanotechnology have now come up with femtotechnology.

Femtotechnology is widely defined as, “Hypothetical term used in reference to structuring of matter on the scale of a femtometer, which is 10^−15m. This is a smaller scale in comparison to nanotechnology and picotechnology which refer to 10^−9m and 10^−12m respectively.”

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Sep 22, 2016

Mach Effect Propulsion Theory Updates

Posted by in categories: information science, particle physics, space travel

Theory of a mach effect thruster I

The Mach Effect Thruster (MET) is a propellant—less space drive which uses Mach’s principle to produce thrust in an accelerating material which is undergoing mass—energy fluctuations. Mach’s principle is a statement that the inertia of a body is the result of the gravitational interaction of the body with the rest of the mass-energy in the universe. The MET device uses electric power of 100 — 200 Watts to operate. The thrust produced by these devices, at the present time, are small on the order of a few micro-Newtons. Researchers give a physical description of the MET device and apparatus for measuring thrusts. Next they explain the basic theory behind the device which involves gravitation and advanced waves to incorporate instantaneous action at a distance. The advanced wave concept is a means to conserve momentum of the system with the universe. There is no momentun violation in this theory. We briefly review absorber theory by summarizing Dirac, Wheeler-Feynman and Hoyle-Narlikar (HN). They show how Woodward’s mass fluctuation formula can be derived from first principles using the HN-theory which is a fully Machian version of Einstein’s relativity. HN-theory reduces to Einstein’s field equations in the limit of smooth fluid distribution of matter and a simple coordinate transformation.

It is shown that if Mach’s Principle is taken seriously, and the inertia of a body can be described as the interaction of the body with the rest of the universe, then the advanced and retarded fields transmitted between the particle and the universe can be used to explain the thrust observed in the Mach Effect drive experiments. This idea was originally put forward by one of the authors, James Woodward. The idea of inertia being a gravitational effect was first postulated by Einstein. In fact Mach’s principle was the foundation on which Einstein’s general relativity was based.

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Sep 21, 2016

Passive Liquid Flow Can Aid Nanotechnology Development, Study Suggests

Posted by in categories: computing, engineering, nanotechnology, particle physics

Again organic nature teaches technology.

A new study, inspired by water’s movement from roots to leaves in tall trees, shows that a certain kind of passive liquid flow, where liquids naturally move in response to surface atomic interactions instead of being driven by external forces like pumps, is remarkably strong. By virtually modeling the way atoms interact at a solid surface, College of Engineering and Computer Science researchers suggest that passive liquid flow could serve as a highly efficient coolant-delivery mechanism without the need for pumps. The results, published in Langmuir, also have implications for the development of new nanoscale technology.

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 20, 2016

Calgary researchers teleport light particle 6.2 kilometres, raising hopes for ‘quantum internet’

Posted by in categories: internet, particle physics, quantum physics

The team’s article in Nature Photonics says the demonstration ‘constitutes a milestone towards a global quantum internet,’ as it is one of the longest distances over which quantum teleportation has been achieved using a fibre-optic network in this way.

In a “major step” toward practical quantum networking, researchers at the University of Calgary have successfully demonstrated the teleportation of a light particle’s properties between their lab and the city’s downtown area, six kilometres away.

“What is remarkable about this is that this information transfer happens in what we call a disembodied manner,” said physics professor Wolfgang Tittel, whose team’s work was published this week in the journal Nature Photonics.

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Sep 20, 2016

Teleportation step toward quantum internet

Posted by in categories: internet, particle physics, quantum physics

Is everyone ready for a new teleporting net?

Physicists have set a new bar for quantum teleportation: moving information from one place to another without physically sending anything between the locations.

Two separate teams managed to teleport information across several kilometres of optical fibre network in two cities.

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