Qubits and Pieces

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Quantum dots boost graphene's photodetector dreams

Researchers working at the Institute of Photonic Sciences (ICFO) in Barcelona have built a super-sensitive photodetector by combining graphene with semiconducting quantum dots that outperforms other graphene based devices by a billion times.

Speaking to PhysicsWorld , lead researcher Gerasimos Konstantatos explains: “We managed to successfully combine graphene with semiconducting nanocrystals to create... Read more

Protein plus graphene equals enzyme detecting paper

Earlier this year, a group of researchers grew their own circuitry using proteins found in milk, mucus and blood. In a similar vein, scientists in Switzerland have announced work on layering proteins with graphene to create a new kind of conductive paper.

In a paper in the May 6th issue of the journal Nature, the researchers from ETH Zurich’s Food & Soft Materials Science lab explain how they used... Read more

Layered graphene bests ITO's transparent conductivity

Sandwiching Ferric Chloride between two layers of graphene results in the most flexible, transparent conductive material ever, according to scientists at Exeter University.

In a paper in Advanced Materials, the scientists describe how the sandwiching improves graphene’s poor conductivity – relative to the current transparent conductor of choice in electronics: Indium Tin Oxide (ITO).

In the abstract,... Read more

300 atom quantum simulator smashes qubit record

An international group of scientists, working with the National Institute for Science and Technology (NIST) in the US have built the world’s largest ever quantum simulator, smashing previous record for the number of qubits. The device, which has passed a series of benchmarking tests, could be used to simulate problems in quantum mechanics that would be utterly intractable for a conventional computer.

The... Read more

Bismuth films exhibit graphene-like behaviour

MIT researchers have identified a new material that shares many of graphene’s interesting properties. Writing in Nano Letters, the researchers describe how thin films of bismuth-antimony share a property with graphene called two-dimensional Dirac cones.

A 2D Dirac cone, being two dimensional, is not a literal cone. It is named for the shape of the graph you get if you plot the energy against momentum of an... Read more

IBM demos tunable terahertz filters

Graphene has shown itself, once again, to be capable of great wonders, as IBM demonstrates a notch filter that operates in the terahertz – or infrared - range. The company also showed off a linear polariser using the same stacked material.

Terahertz radiation (sub-millimetre electro-magnetic type radiation, not the nuclear type) is of interest because it can pass through many things, such as fog, clouds,... Read more

New photon qubit generator 1000x faster than rivals

Scientists in the US have demonstrated a new technique for generating photons for use in optical quantum information processing: using a laser to excite a single photon from a cloud of rubidium gas.

The technique, developed at the Georgia Institute of Technology Research, exploits the properties of an atom in which one or more electrons has been excited near ionisation energy levels, the so-called Rydberg... Read more

First demo of quantum switching network claimed

Researchers at the Max Planck Institute of Quantum Optics (MPQ) are claiming a world first with a demonstration of a quantum switching network. The Institute reports data being exchanged successfully "with high efficiency and fidelity" between two quantum nodes installed in two separate labs, connected by a 60-metre long optical fibre.

This sounds straightforward enough, but is more impressive when you in... Read more

Scientists build quantum computer in a diamond

Diamonds are forever in the movies, and now they are making a stab at eternity in quantum computing.

An international group of scientists have built a working quantum computer inside a diamond, and for the first time, have included protection against decoherence.

According to a paper published in the April 5 issue of Nature, the team exploited natural flaws in diamond’s crystal structure to create... Read more

Researchers generate flying qubits in semiconductors

Researchers at Ruhr-Universitat Bochum report the creation of electron qubits in semiconductors. So far, the team says, electron qubits have all been created in a vacuum, so this development really does look like a next step on the oft-mentioned road to quantum computing.

The problem with solid state qubits is, in very broad terms, that electrons are just too friendly. On its path through a material, an... Read more

About this blog

Coretech

News from the frontline of the weird and wonderful world of quantum computing. From the theoretical musings of solid state physicists to breakthroughs you might actually see in a data centre in your lifetime, we'll be keeping an eye on stuff that matters in materials science, including graphene, condensed matter, diamonds and so on. And last, but by no mean least, we'll be tracking the spin on spintronics. Just don't mention room temperature.

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ZDNet UK Live

Burn-IT

Skittles with tapes and coffee cups. Old tapes so we didn't have to rewind them afterwards.

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2 hours ago by Andy Bolstridge via Facebook on Next-generation 802.11ac routers
pjc158

So when is Amazon buying Waterstones?

3 hours ago by pjc158 on Waterstones to sell Kindles with in-store offers
J.A. Watson

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3 hours ago by J.A. Watson on Samsung N150 Plus Netbook - Ubuntu Netbook Edition 10.04
J.A. Watson

@duncanjmurray - At least n the case of the specific system I put the SSD into, it is not the case. The boot time improvement is substantial, but...

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archerthom

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