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Archive for the ‘quantum physics’ category: Page 788

Jan 9, 2016

Science Documentary: DNA Hard Drives, Quantum Computing, Moore’s Law

Posted by in categories: computing, education, materials, nanotechnology, particle physics, quantum physics, science, security

DNA is similar to a hard drive or storage device, in that contains the memory of each cell of every living, and has the instructions on how to make that cell. DNA is four molecules combined in any order to make a chain of one larger molecule. And if you can read that chain of four molecules, then you have a sequence of characters, like a digital code. Over the years the price of sequencing a human genome has dropped significantly, much to the delight of scientists. And since DNA is a sequence of four letters, and if we can manipulate DNA, we could insert a message and use DNA as the storage device.

At this point in time, we are at the height of the information age. And computers have had an enormous impact on all of our lives. Any information is able to be represented as a collection of bits. And with Moore’s law, which states that computing power doubles every 18 months, our ability to manipulate and store these bits has continued to grow and grow. Moore’s law has been driven by scientists being able to make transistors and integrated circuits continuously smaller and smaller, but there eventually comes a point we reach in which these transistors and integrated circuits cannot be made any smaller than they already are, since some are already at the size of a single atom. This inevitably leads us into the quantum world. Quantum mechanics has rules which are, in many ways, hard for us to truly comprehend, yet are nevertheless tested. Quantum computing looks to make use of these strange rules of quantum physics, and process information in a totally different way. Quantum computing looks to replace the classical bits which are either a 0 or a 1, with quantum bits, or qubits, which can be both a 0 and a 1 at the same time. This ability to be two different things at the same time is referred to as a superposition. 200 qubits hold more bits of information than there are particles in the universe. A useful quantum computer will require thousands or even millions of physical qubits. Anything such as an atom can serve as a quantum bit for making a quantum computer, then you can use a superconducting circuit to build two artificial atoms. So at this point in time we have a few working quantum transistors, but scientists are working on developing the quantum integrated circuit. Quantum error correction is the biggest problem encountered in development of the quantum computer. Quantum computer science is a field that right now is in its very early stages, since scientists have yet been able to develop any quantum hardware.

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Jan 5, 2016

The Secret to Everyday Time Travel Is Simple, Insane

Posted by in categories: particle physics, quantum physics, time travel

Since you first started learning about the world, you’ve known that cause leads to effect. Everything that’s ever happened to or near you has reiterated this point, making it seem like a fundamental law of nature. It isn’t.

It is, in fact, possible for an event to occur before its causal factors have manifested or happened. This isn’t how appliances work — you don’t have to worry about will have having left the oven on — but it is how particle physics works. It’s also the key to explaining how time travel, under the laws of quantum physics, could operate.

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Jan 3, 2016

DARPA Backs Atoms-to-Products Milestone

Posted by in categories: engineering, materials, nanotechnology, particle physics, quantum physics

DARPA funds the Atoms-to-Products program that aims to maintain quantum nanoscale properties at the millimeter scale of microchips.

The main goal of the atoms-to-products program is to create technology and processes needed to create nanometer-scale pieces, with dimensions almost the size of atoms, into components and materials only millimeter scale in size. And to spur developments in the program DARPA has now posed the challenge to 10 laboratories across the nation.

To get the full benefits of nanoscale engineering at the millimeter scale, the organization has partnered with Intelligent Materials Solutions. “Our initial project will be to control infrared light by assembling nanoscale particles into finished components that are one million times larger,” explains Adam Gross, the team leader working closely with Christopher Roper to bring the Atoms-to Products project to fruition.

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Jan 1, 2016

Wormholes are just quantum entangled black holes, says new research

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

Interesting, but older…


Two separate research groups, one of which is from MIT, have presented evidence that wormholes — tunnels that may allow us to travel through time and space — are “powered” by quantum entanglement. Furthermore, one of the research groups also postulates the reverse — that quantum entangled particles are connected by miniature wormholes.

A wormhole, or Einstein-Rosen bridge to give its formal name, is a hypothetical feature of spacetime that exists in four dimensions, and somehow connects to another wormhole that’s located elsewhere in both space and time. The theory, essentially, is that a wormhole is a tunnel that isn’t restricted by the normal limitations of 3D Cartesian space and the speed of light, allowing you to travel from one point in space and time, to another point in space and time — theoretically allowing you to traverse huge portions of the universe, and travel in time.

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Dec 30, 2015

Two Steps Closer to a Quantum Internet

Posted by in categories: internet, quantum physics

Einstein’s “spooky action at a distance” can reach as far as low earth orbit, and twisted light could boost quantum communication bandwidth.

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Dec 29, 2015

Researchers Have Succesfully Written Quantum Code On A Silicon Chip For The First Time

Posted by in categories: computing, quantum physics

Researchers from the University Of New South Wales(UNSW) in Australia have successfully demonstrated that they can write and control the quantum version of computer code on a silicon microchip. Computers, at the moment, use binary language to operate, 0 and 1. Together, these two bits generate code words that can be used to program complex commands. But in quantum computing language there’s also the option for bits to be in superposition, what this actually means is that they can be 1 and 0 at the very exact same time. This unlocks a massively more powerful programming language, but until now scientists haven’t been able to figure out how to write it.

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Dec 28, 2015

Quantum Delayed-Choice Experiment with a Beam Splitter in a Quantum Superposition

Posted by in categories: particle physics, quantum physics

A beam splitter is placed in a quantum superposition state of being both active and inactive allowing the wave and particle aspects of the system to be observed in a single setup.

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Dec 28, 2015

Faster entanglement of distant quantum dots

Posted by in categories: futurism, quantum physics

Entanglement between distant quantum objects is an important ingredient for future information technologies. Researchers at the ETH have now developed a method with which such states can be created a thousand times faster than before.

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Dec 27, 2015

Could Time Travel Soon Become a Reality? Physicists Simulate Sending Quantum light Particles into the Past

Posted by in categories: evolution, particle physics, quantum physics, time travel

If a time traveler went back in time and stopped their own grandparents from meeting, would they prevent their own birth?

That’s the crux of an infamous theory known as the ‘grandfather paradox’, which is often said to mean time travel is impossible — but some researchers think otherwise. A group of scientists have simulated how time-travelling photons might behave, suggesting that, at the quantum level, the grandfather paradox could be resolved.

The research was carried out by a team of researchers at the University of Queensland in Australia and their results are published in the journal Nature Communications. The study used photons — single particles of light — to simulate quantum particles travelling back through time. By studying their behavior, the scientists revealed possible bizarre aspects of modern physics.

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Dec 21, 2015

Team succeeds in observing a two-phonon quantum interference, a world first

Posted by in categories: particle physics, quantum physics

A research group at Osaka University has succeeded in observing at the intended timing two-phonon quantum interference by using two cold calcium ions in ion traps, which spatially confine charged particles. A phonon is a unit of vibrational energy that arises from oscillating particles within crystals. Two-particle quantum interference experiments using two photons or atoms have been previously reported, but this group’s achievement is the world’s first observation using two phonons.

This group demonstrated that the phonon, a quantum mechanical description of an elementary vibrational motion in matter, and the photon, an elementary particle of light, share common properties. This group’s research results will contribute to quantum information processing research, including quantum simulation using and quantum interface research.

Ion traps are an important technique in physically achieving quantum information processing including quantum computation, and research on ion traps is being carried out all over the world, with Dr. David J. Wineland of the United States, a leading expert in the field, winning the Nobel Prize in Physics in 2012.

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