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Archive for the ‘quantum physics’ category: Page 709

Feb 3, 2017

Protecting quantum computing networks against hacking threats

Posted by in categories: computing, quantum physics, security

Wish these guys a lot of luck; however, they need to hurry up soon as China is already had a head start with QC.


As we saw during the 2016 US election, protecting traditional computer systems, which use zeros and ones, from hackers is not a perfect science. Now consider the complex world of quantum computing, where bits of information can simultaneously hold multiple states beyond zero and one, and the potential threats become even trickier to tackle. Even so, researchers at the University of Ottawa have uncovered clues that could help administrators protect quantum computing networks from external attacks.

“Our team has built the first high-dimensional quantum cloning machine capable of performing quantum hacking to intercept a secure quantum message,” said University of Ottawa Department of Physics professor Ebrahim Karimi, who holds the Canada Research Chair in Structured Light. “Once we were able to analyze the results, we discovered some very important clues to help protect quantum computing networks against potential hacking threats.”

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Feb 3, 2017

Quantum RAM: Modelling the big questions with the very small

Posted by in categories: climatology, computing, finance, quantum physics, singularity, sustainability

Nice write up. What is interesting is that most folks still have not fully understood the magnitude of quantum and how as well as why we will see it as the fundamental ingredient to all things and will be key in our efforts around singularity.


When it comes to studying transportation systems, stock markets and the weather, quantum mechanics is probably the last thing to come to mind. However, scientists at Australia’s Griffith University and Singapore’s Nanyang Technological University have just performed a ‘proof of principle’ experiment showing that when it comes to simulating such complex processes in the macroscopic world quantum mechanics can provide an unexpected advantage.

Griffith’s Professor Geoff Pryde, who led the project, says that such processes could be simulated using a “quantum hard drive”, much smaller than the required for conventional simulations.

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Feb 3, 2017

Neutrons reveal ‘quantum tunnelling’ on graphene enables the birth of stars

Posted by in categories: chemistry, nanotechnology, particle physics, quantum physics, space travel

Graphene is known as the world’s thinnest material due to its 2-D structure, in which each sheet is only one carbon atom thick, allowing each atom to engage in a chemical reaction from two sides. Graphene flakes can have a very large proportion of edge atoms, all of which have a particular chemical reactivity. In addition, chemically active voids created by missing atoms are a surface defect of graphene sheets. These structural defects and edges play a vital role in carbon chemistry and physics, as they alter the chemical reactivity of graphene. In fact, chemical reactions have repeatedly been shown to be favoured at these defect sites.

Interstellar molecular clouds are predominantly composed of hydrogen in molecular form (H2), but also contain a small percentage of dust particles mostly in the form of carbon nanostructures, called polyaromatic hydrocarbons (PAH). These clouds are often referred to as ‘star nurseries’ as their low temperature and high density allows gravity to locally condense matter in such a way that it initiates H fusion, the nuclear reaction at the heart of each star. Graphene-based materials, prepared from the exfoliation of graphite oxide, are used as a model of interstellar carbon dust as they contain a relatively large amount of , either at their edges or on their surface. These defects are thought to sustain the Eley-Rideal chemical reaction, which recombines two H into one H2 molecule.

The observation of interstellar clouds in inhospitable regions of space, including in the direct proximity of giant stars, poses the question of the origin of the stability of hydrogen in the molecular form (H2). This question stands because the clouds are constantly being washed out by intense radiation, hence cracking the hydrogen molecules into atoms. Astrochemists suggest that the chemical mechanism responsible for the recombination of atomic H into molecular H2 is catalysed by carbon flakes in interstellar clouds. Their theories are challenged by the need for a very efficient surface chemistry scenario to explain the observed equilibrium between dissociation and recombination. They had to introduce highly reactive sites into their models so that the capture of an atomic H nearby occurs without fail.

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Feb 2, 2017

Cleaning up quantum devices

Posted by in categories: computing, quantum physics

Latest update on the NPL Research on how to have cleaner Quantum Devices.


A paper, based on NPL collaborative research, has been published in the journal Physical Review Letters The work paves the way for the identification and elimination of small amounts of surface defects whose presence on the surfaces of solid state quantum devices is detrimental to their performance.

The research was the result of a fruitful collaboration between NPL’s Quantum Detection Group, the Quantum Device Physics Laboratory at Chalmers University of Technology and the Institute of Chemical Physics at the University of Latvia.

Artistic impression of noise in quantum circuits

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Feb 2, 2017

Researchers Use Crystal Sensor to Study Crucial Cell Behavior

Posted by in categories: health, quantum physics

I had to take a second review of this since I posted it, and right away I see something quite interesting that folks have overlooked for a while. Will keep you posted.


Scientists funded by the National Institutes of Health have built a new tool to monitor the way cells attach to an adjoining substrate under a microscope.

Analyzing adhesion events can help researchers to understand the way diseases spread, tissues grow, and stem cells differentiate into many specific cell types. The technique provides high-resolution images that can monitor the interactions of cells across longer time periods than previously possible.

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Feb 2, 2017

Quantum Encryption Just Took One More Step Toward Beating Hackers

Posted by in categories: cybercrime/malcode, encryption, quantum physics

Nice read on QC cryptography.


Between Russian hackers and insecure email servers, this past election has proved that cyber security is going to be extremely important moving forward. But with the advent of quantum computers, it’s only going to become harder to keep data safe from those with the motive and the right tools. Fortunately, scientists believe they may have found a solution within the same principles that guide quantum computing: quantum encryption.

To fully understand the scope of what quantum computers can do, it’s important to realize that it might take current, non-quantum computers longer than the total age of the universe to crack certain encryptions. But, as grad student Chris Pugh explained in a recent interview with Wired, quantum computers might be able to crack the same codes in “a matter of hours or days”.

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Feb 2, 2017

What Quantum Gravity Needs Is More Experiments

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

Agree; math is a must. However, experimentation is when the rubber meets the road.


In the mid-1990s, I studied mathematics. I wasn’t really sure just what I wanted to do with my life, but I was awed by the power of mathematics to describe the natural world. After classes on differential geometry and Lie algebras, I attended a seminar series offered by the math department about the greatest problem in fundamental physics: how to quantize gravity and thereby bring all the forces of nature under one theoretical umbrella. The seminars focused on a new approach pioneered by Abhay Ashtekhar at Penn State University. It wasn’t research I had previously encountered, and I came away with the impression that the problem had been solved; the news just hadn’t yet spread.

It seemed a clear victory for pure thought. The requirement of mathematical consistency also led, for example, to the discovery of the Higgs boson. Without the Higgs, the Standard Model of particle physics would stop working for particles that are collided at energies above 1 teraelectron-volts, well within the range of the Large Hadron Collider. Probabilities would no longer add to 100 percent and would cease to make mathematical sense. Something new thus had to turn up once that energy was crossed. The Higgs was the simplest possibility that physicists could think of—and, sure enough, they found it.

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Feb 2, 2017

Scientists begin building supercomputer programmed to solve ultimate question of life

Posted by in categories: cosmology, quantum physics, robotics/AI, supercomputing

Oh, there will be many things come together for all of us when we begin further expanding and advancing our work on quantum especially in our work with Quantum parallel states, as well as the work on both AI and Synbio on QC. Next 3 to 5 yrs are truly going to change a lot of things in science and technology.


British scientists have taken the first step towards building a real-life version of Deep Thought, the supercomputer programmed to solve the “ultimate question of life, the universe, and everything” in Douglas Adams’s The Hitchhiker’s Guide To The Galaxy. The team has drawn up the first blueprint for a giant quantum computer, a device capable of rapidly solving problems that would take an ordinary computer billions of years to answer.

The ground-breaking modular design could theoretically pave the way to a machine as large as a football field with undreamed of levels of computing power.

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Feb 2, 2017

Cosmic test backs ‘quantum spookiness’

Posted by in category: quantum physics

Physicists harness starlight to support the case for entanglement.

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Feb 2, 2017

Quantum phase transition observed for the first time

Posted by in category: quantum physics

A group of scientists led by Johannes Fink from the Institute of Science and Technology Austria (IST Austria) reported the first experimental observation of a first-order phase transition in a dissipative quantum system. Phase transitions include such phenomena as the freezing of water at the critical temperature of 0 degrees Celsius. However, phase transitions also occur at the quantum mechanical level, where they are still relatively unexplored by researchers.

One example of a phase transition at the quantum level is the photon-blockade breakdown, which was only discovered two years ago. During photon blockade, a photon fills a cavity in an optical system and prevents other photons from entering the same cavity until it leaves, hence blocking the flow of photons. But if the photon flux increases to a critical level, a quantum phase transition is predicted: The photon blockade breaks down, and the state of the system changes from opaque to transparent. This specific phase transition has now been experimentally observed by researchers who, for the first time, met the very specific conditions necessary to study this effect.

During a phase transition, the continuous tuning of an external parameter, for example temperature, leads to a transition between two robust steady states with different attributes. First-order are characterized by a coexistence of the two stable phases when the control parameter is within a certain range close to the critical value. The two phases form a mixed phase in which some parts have completed the transition and others have not, as in a glass containing ice water. The experimental results that Fink and his collaborators will publish in the journal Physical Review X give insight into the quantum mechanical basis of this effect in a microscopic, zero-dimensional system.

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