Tag Archives | Spintronics
Faster Computers: Entanglement On a Chip

Faster Computers: Entanglement On a Chip

Unlike Bilbo’s magic ring, which entangles human hearts, engineers have created a new micro-ring that entangles individual particles of light, an important first step in a whole host of new technologies.   Entanglement — the instantaneous connection between two particles no matter their distance apart — is one of the most intriguing and promising phenomena [...]

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New Laser for Computer Chips

New Laser for Computer Chips

Scientists from Forschungszentrum Jülich and the Paul Scherrer Institute in Switzerland in cooperation with international partners have presented the first semiconductor consisting solely of elements of main group IV. As a consequence, the germanium-tin (GeSn) laser can be applied directly onto a silicon chip and thus creates a new basis for transmitting data on computer [...]

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Quantum Computing: Rice-Sized Laser Power

Quantum Computing: Rice-Sized Laser Power

Princeton University researchers have built a rice grain-sized laser powered by single electrons tunneling through artificial atoms known as quantum dots. The tiny microwave laser, or “maser,” is a demonstration of the fundamental interactions between light and moving electrons.   The researchers built the device — which uses about one-billionth the electric current needed to [...]

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Improved Interface for a Quantum Internet

Improved Interface for a Quantum Internet

A quantum network requires efficient interfaces over which information can be transferred from matter to light and back. In the current issue of Physical Review Letters, Innsbruck physicists led by Rainer Blatt and Tracy Northup show how this information transfer can be optimized by taking advantage of a collective quantum phenomenon.   Quantum computers are [...]

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Underwater Drones Map Ice Algae in Antarctica

Underwater Drones Map Ice Algae in Antarctica

Splash. A Weddell seal weighing almost 500 kg lands inside the tent and blocks the hole laboriously sawn out by researchers in the two-metre-thick ice to launch drones under the sea ice. The tent is lovely and warm. Small petroleum ovens provide heat to keep the hole free from ice. Outside the Antarctic sea ice [...]

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Half-Light Half-Matter Quantum Particles

Prospects of developing computing and communication technologies based on quantum properties of light and matter may have taken a major step forward thanks to research by City College of New York physicists led by Dr. Vinod Menon. In a pioneering study, Professor Menon and his team were able to discover half-light, half-matter particles in atomically [...]

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A Qubit Candidate Shines Brighter

A Qubit Candidate Shines Brighter

In the race to design the world’s first universal quantum computer, a special kind of diamond defect called a nitrogen vacancy (NV) center is playing a big role. NV centers consist of a nitrogen atom and a vacant site that together replace two adjacent carbon atoms in diamond crystal. The defects can record or store [...]

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Instant-Start Computers With New Breakthrough

Instant-Start Computers With New Breakthrough

To encode data, today’s computer memory technology uses electric currents — a major limiting factor for reliability and shrinkability, and the source of significant power consumption. If data could instead be encoded without current — for example, by an electric field applied across an insulator — it would require much less energy, and make things [...]

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Scientists Measure Speedy Electrons in Silicon

Scientists Measure Speedy Electrons in Silicon

The entire semiconductor industry, not to mention Silicon Valley, is built on the propensity of electrons in silicon to get kicked out of their atomic shells and become free. These mobile electrons are routed and switched though transistors, carrying the digital information that characterizes our age.   An international team of physicists and chemists based [...]

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Possible Read Head for Quantum Computers

Possible Read Head for Quantum Computers

Nitrogen-vacancy centers in diamonds could be used to construct vital components for quantum computers. But hitherto it has been impossible to read optically written information from such systems electronically. Using a graphene layer, a team of scientists headed by Professor Alexander Holleitner of the Technische Universität München (TUM) has now implemented just such a read [...]

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