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Archive for the ‘quantum physics’ category: Page 755

Oct 14, 2016

Diamonds aren’t forever: Team create first quantum computer bridge

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

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link “People have already built small quantum computers,” says Sandia researcher Ryan Camacho. “Maybe the first useful one won’t be a single giant quantum computer but a connected cluster of small ones.”

Distributing quantum information on a bridge, or network, could also enable novel forms of quantum sensing, since quantum correlations allow all the atoms in the network to behave as though they were one single atom.

The joint work with Harvard University used a focused implanter at Sandia’s Ion Beam Laboratory designed for blasting single ions into precise locations on a diamond substrate. Sandia researchers Ed Bielejec, Jose Pacheco and Daniel Perry used implantation to replace one carbon atom of the diamond with the larger silicon atom, which causes the two on either side of the silicon atom to feel crowded enough to flee. That leaves the silicon atom a kind of large landowner, buffered against stray electrical currents by the neighboring non-conducting vacancies.

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Oct 14, 2016

Australian engineer takes out inaugural global prize for quantum computing

Posted by in categories: business, computing, engineering, quantum physics

Leading Australian engineer and physicist, Professor Andrea Morello, was today named inaugural recipient of the Rolf Landauer and Charles H. Bennett Award in Quantum Computing by the prestigious American Physical Society, the world’s leading organisation of physicists.

Morello, a professor in UNSW’s School of Electrical Engineering & Telecommunications and head of the Quantum Spin Control group at the Centre for Quantum Computation and Communication Technology, was awarded the prize “for remarkable achievements in the experimental development of spin qubits in silicon”.

The prize, endowed by the International Business Machines Corp, is named for two of the founding fathers of modern information science, both classical and quantum.

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Oct 14, 2016

Forever quantum: physicists demonstrate everlasting quantum coherence

Posted by in category: quantum physics

(Phys.org)—Physicists have implemented the first experimental demonstration of everlasting quantum coherence—the phenomenon that occurs when a quantum system exists in a superposition of two or more states at once. Typically, quantum coherence lasts for only a fraction of a second before decoherence destroys the effect due to interactions between the quantum system and its surrounding environment.

The collaboration of physicists, led by Gerardo Adesso at The University of Nottingham and with members from the UK, Brazil, Italy, and Germany, have published a paper on the demonstration of the extreme resilience of quantum coherence in a recent issue of Physical Review Letters.

“Quantum properties can be exploited for disruptive technologies but are typically very fragile,” Adesso told Phys.org. “Here we report an experiment which shows for the first time that quantum coherence in a large ensemble of nuclear spins can be naturally preserved (‘frozen’) under exposure to strong dephasing noise at room temperature, without external control, and for timescales as long as a second and beyond.”

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Oct 13, 2016

Berkeley Lab announces first transistor with a working 1-nanometer gate

Posted by in categories: computing, nanotechnology, quantum physics

Breaks through the 5-nanometer quantum tunneling threshold; may allow for Moore’s law to continue…


Schematic of a transistor with molybdenum disulfide semiconductor and 1-nanometer carbon nanotube gate. (credit: Sujay Desai/Berkeley Lab)

The first transistor with a working 1-nanometer (nm) gate has been created by a team led by Lawrence Berkeley National Laboratory (Berkeley Lab) scientists. Until now, a transistor gate size less than 5 nanometers has been considered impossible because of quantum tunneling effects. (One nanometer is the diameter of a glucose molecule.)

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Oct 13, 2016

BT And Toshiba Showcase UK’s First Secure Quantum Communications

Posted by in categories: encryption, quantum physics

BT and Toshiba have showcased the UK’s first use of secure quantum communication at the telecoms company’s research and development centre in Ipswich.

The showcase demonstrates the use of quantum cryptography for communications over fibre optic cabling. By exploiting the quantum states of photons, the most visible elementary particles in the electromagnetic spectrum, the cryptographic technique can be used to communicate securely over normal fibre cables.

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Oct 13, 2016

Quantum film sensor stops delivery drones crashing into things

Posted by in categories: drones, military, quantum physics

A sensor that uses infrared laser light and quantum film detects objects up to 20 metres away, helping drones to dodge collisions.

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Oct 13, 2016

Will Quantum Computers Kill Bitcoin?

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

Since they were first theorized by the physicist Richard Feynman in 1982, quantum computers have promised to bring about a new era of computing. It is only relatively recently that theory has translated into significant real-world advances, with the likes of Google, NASA and the CIA working towards building a quantum computer. Computer scientists are now warning that the arrival of the ultra-powerful machines will cripple current encryption methods and as a result bring a close to the great bitcoin experiment—collapsing the technological foundations that bitcoin is built upon.

“Bitcoin is definitely not quantum computer proof,” Andersen Cheng, co-founder of U.K. cybersecurity firm Post Quantum, tells Newsweek. “Bitcoin will expire the very day the first quantum computer appears.”

The danger quantum computers pose to bitcoin, Cheng explains, is in the cryptography surrounding what is known as the public and private keys—a set of numbers used to facilitate transactions. Users of bitcoin have a public key and a private key. In order to receive bitcoin, the recipient shares the public key with the sender, but in order to spend it they need their private key, which only they know. If somebody else is able to learn the private key, they can spend all the bitcoin.

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Oct 13, 2016

Beyond Exaflop supercomputers will require new materials, new architectures, new memory and quantum computers

Posted by in categories: nanotechnology, quantum physics, supercomputing

Eurolab HPC tries to assess the future disruptive technology for high performance computing beyond Exascale computers.

They survey the currents state of research and development and its potential for the future of the following hardware technologies:

CMOS scaling
Die stacking and 3D chip technologies
Non-volatile Memory (NVM) technologies
Photonics
Resistive Computing
Neuromorphic Computing
Quantum Computing
Nanotubes
Graphene and
Diamond Transistors

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Oct 11, 2016

Massive Disruption Is Coming With Quantum Computing

Posted by in categories: computing, quantum physics, robotics/AI

As I and others have warned industry about for a ling while now. Wait until you see the AI experience on QC and how we enable synthetic biocomputing on this connected infrastructure.


Next year, we may see the launch of the first true quantum computers.

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Oct 11, 2016

Physicists Have Quantum Computing A Step Closer To Reality

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

The world of quantum computing is a minefield. The more scientists think they know about it, the more they realize there’s so much more to learn. But, with thanks to physicists in a laboratory in Canberra, we are that one step closer to seeing a real life working quantum computer as they managed to freeze light in a cloud of atoms. This was achieved by using a vaporized cloud of ultracold rubidium atoms to create a light trap into which infrared lasers were shone. The light was then constantly emitted and re-captured by the newly formed light trap.

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