Tag Archives | Physics
Light Sources for New Quantum Technology

Light Sources for New Quantum Technology

Electronic circuits are based on electrons, but one of the most promising technologies for future quantum circuits are photonic circuits, i.e. circuits based on light (photons) instead of electrons. First, it is necessary to be able to create a stream of single photons and control their direction. Researchers around the world have made all sorts [...]

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Laser Pulse Turns Glass Into a Metal

Laser Pulse Turns Glass Into a Metal

For tiny fractions of a second, quartz glass can take on metallic properties, when it is illuminated be a laser pulse. This has been shown by calculations at the Vienna University of Technology. The effect could be used to build logical switches which are much faster than today’s microelectronics. Quartz glass does not conduct electric [...]

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Laser Makes Microscopes Far More Sensitive

Laser Makes Microscopes Far More Sensitive

Laser physicists have found a way to make atomic-force microscope probes 20 times more sensitive and capable of detecting forces as small as the weight of an individual virus.   The technique, developed by researchers at The Australian National University (ANU), hinges on using laser beams to cool a nanowire probe to minus 265 degrees [...]

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A Transistor-Like Amplifier for Single Photons

A Transistor-Like Amplifier for Single Photons

Data transmission over long distances usually utilizes optical techniques via glass fibres — this ensures high speed transmission combined with low power dissipation of the signal. For quite some years possibilities have been explored how to go one step further and perform all-optical data processing, with optical transistors and optical logic gates. In particular in [...]

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Weird Magic Ingredient for Quantum Computing

Weird Magic Ingredient for Quantum Computing

A form of quantum weirdness is a key ingredient for building quantum computers according to new research from a team at the University of Waterloo’s Institute for Quantum Computing (IQC).   In a new study published in the journal Nature, researchers have shown that a weird aspect of quantum theory called contextuality is a necessary [...]

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Computer-Assisted Accelerator Design

Computer-Assisted Accelerator Design

If you walk by room 201 in Building 911 at the U.S. Department of Energy’s Brookhaven National Laboratory, you might think Stephen Brooks is playing a cool new video game. But Brooks is doing important, innovative work. He’s using his own custom designed software to create a 3-D virtual model of the electron accelerator Brookhaven [...]

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New ‘Switch’ Could Power Quantum Computing

New ‘Switch’ Could Power Quantum Computing

Using a laser to place individual rubidium atoms near the surface of a lattice of light, scientists at MIT and Harvard University have developed a new method for connecting particles — one that could help in the development of powerful quantum computing systems.   The new technique, described in a paper published today in the [...]

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Optical Tweezers Split Ultracold Atom Clouds

Optical Tweezers Split Ultracold Atom Clouds

Physicists at New Zealand’s University of Otago have pushed the frontiers of quantum technology by developing a steerable ‘optical tweezers’ unit that uses intense laser beams to precisely split minute clouds of ultracold atoms and to smash them together.   The Otago researchers’ feat is set to enhance efforts to understand the mysterious ways that [...]

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Einstein’s ‘Spooky’ Theory: Quantum Internet?

Einstein’s ‘Spooky’ Theory: Quantum Internet?

Einstein’s skepticism about quantum mechanics may lead to an ultra-secure Internet, suggests a new paper by researchers from Swinburne University of Technology and Peking University.   Associate Professor Margaret Reid from Swinburne’s Centre for Quantum and Optical Science said Einstein’s reservations about quantum mechanics were highlighted in a phenomenon known as “‘spooky’ action at a [...]

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Electronics Based On a 2-D Electron Gas

Electronics Based On a 2-D Electron Gas

Usually, microelectronic devices are made of silicon or similar semiconductors. Recently, the electronic properties of metal oxides have become quite interesting. These materials are more complex, yet offer a broader range of possibilities to tune their properties. An important breakthrough has now been achieved at the Vienna University of Technology: a two dimensional electron gas [...]

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