A foundation for quantum computing

Quantum computers are in theory capable of simulating the interactions of molecules at a level of detail far beyond the capabilities of even the largest supercomputers today. Such simulations could revolutionize chemistry, biology and materials science, but the development of quantum computers has been limited by the ability to increase the number of quantum bits, or qubits, that encode, store and access large amounts of data.

In a paper published in the Journal of Applied Physics, a team of researchers at the Georgia Tech Research Institute (GTRI) and Honeywell International have demonstrated a new device that allows more electrodes to be placed on a chip—an important step that could help increase qubit densities and bring us one step closer to a quantum computer that can simulate molecules or perform other algorithms of interest.

Advance in quantum error correction

Quantum computers are largely theoretical devices that could perform some computations exponentially faster than conventional computers can. Crucial to most designs for quantum computers is quantum error correction, which helps preserve the fragile quantum states on which quantum computation depends.

The ideal quantum error correction code would correct any errors in quantum data, and it would require measurement of only a few quantum bits, or qubits, at a time. But until now, codes that could make do with limited measurements could correct only a limited number of errors—one roughly equal to the square root of the total number of qubits. So they could correct eight errors in a 64-qubit quantum computer, for instance, but not 10.

Maximizing the Value of Scientific Literature

Reading through the more than one million articles published annually isn’t an option for life sciences researchers that want to keep on top of the constantly growing body of medical literature. That leaves two primary strategies for sifting through the burgeoning literature and extracting meaningful information: manual curation or automated curation.

For years manual curation of scientific publications has been the gold standard, with technology-based solutions ranking far behind in terms of accuracy and completeness. Today, that’s no longer the case. Versatile, well-designed and well-tested applications, combined with significantly enhanced computational power, are elevating automated curation to a more equivalent position. Proprietary text-mining technologies now rival manual curation for some types of search needs as a means of ensuring researchers aren’t missing out on valuable information.

Cooling the cloud

Data centers are one of the largest and fastest-growing consumers of electricity in the U.S.

The industry has been shifting from open-air cooling of these facilities to increasingly complex systems that segregate hot air from cold air. When it comes to cost savings, there are definite advantages to the aisle containment systems, which have been estimated to save 30% of cooling energy—but it's not yet clear how they increase the risk of overheating, or how to design them for greatest safety and optimum energy efficiency.
That's what Husam Alissa, a doctoral candidate in mechanical engineering, is trying to determine at Binghamton Univ.'s state-of-the-art Center for Energy-Smart Electronic Systems (ES2).

Entangled photons unlock super-sensitive characterization of quantum tech

A new protocol for estimating unknown optical processes, called unitary operations, with precision enhanced by the unique properties of quantum mechanics has been demonstrated by scientists and engineers from the Univ. of Bristol and the Centre for Quantum Technologies in Singapore.

The work, published in Optica, could lead to both dramatically better sensors for medical research and new approaches to benchmark the performance of ultra-powerful quantum computers.

History tells us the ability to measure parameters and sense phenomena with increasing precision leads to dramatic advances in identifying new phenomena in science and improving the performance of technology: famous examples include x-ray imaging, magnetic resonance imaging (MRI), interferometry and the scanning-tunneling microscope.
Scientists are understanding how to engineer and control quantum systems to vastly expand the limits of measurement and sensing is growing rapidly. This area, known as quantum metrology, promises to open up radically alternative methods to the current state-of-the-art in sensing.

Tool measures the distance between phonon collisions

Today’s computer chips pack billions of tiny transistors onto a plate of silicon within the width of a fingernail. Each transistor, just tens of nanometers wide, acts as a switch that, in concert with others, carries out a computer’s computations. As dense forests of transistors signal back and forth, they give off heat—which can fry the electronics, if a chip gets too hot.

Manufacturers commonly apply a classical diffusion theory to gauge a transistor’s temperature rise in a computer chip. But now an experiment by Massachusetts Institute of Technology (MIT) engineers suggests that this common theory doesn’t hold up at extremely small length scales. The group’s results indicate that the diffusion theory underestimates the temperature rise of nanoscale heat sources, such as a computer chip’s transistors. Such a miscalculation could affect the reliability and performance of chips and other microelectronic devices.

The Possibilities of 3D Printing: It’s Only the Beginning

The future of 3D printing is bright and full of exciting promise. But the most intriguing scenario for this technology isn’t in the manufacture of objects we see every day—that will only be a small niche in the 3D-printing industry. Instead, 3D printing will realize its full potential when it enables people to innovate and create all new objects and devices in a one-touch process.

3D printing allows for distributed manufacturingmeaning products can be created on demand in a facility nearby. In the near future, this will allow consumers to purchase goods which fit their very specific needs. It will also have these goods printed and shipped in a matter of hours, as opposed to the weeks it can take to receive a custom item.