News

Scientists in Belgium and Spain have proved for the first time that new systems of quantum cryptology are much safer than current security systems.

The most accurate quantum measurements possible are made using an interferometer, which exploits the wave nature of matter and light. In this method, two identical beams of particles are sent along different paths to a detector, with one interacting with an object of interest along the way. Recombining the beams afterwards creates an interference pattern that reflects how much the interacting beam was disturbed -providing details about the object's properties.

Scientists of the Institute for Quantum Optics and Quantum Information (IQOQI) in Innsbruck, Austria, have reached a milestone in the exploration of quantum gas mixtures. In an international first, the research group led by Rudolf Grimm and Florian Schreck has succeeded in producing controlled strong interactions between two fermionic elements -lithium-6 and potassium-40. This model system not only promises to provide new insights into solid-state physics but also shows intriguing analogies to the primordial substance right after the Big Bang.

Physicists around the world are searching for the best way to realize a quantum computer. Now scientists of the team around Stefan Kuhr and Immanuel Bloch at the Max Planck Institute of Quantum Optics (Garching/Munich) took a decisive step in this direction. They could address and change the spin of single atoms with laser light and arrange them in arbitrary patterns. In this way, the physicists strung the atoms along a line and could directly observe their tunnelling dynamics in a "racing duel" of the atoms.

Researchers at the University of Vienna in Austria and the Technische Universität München in Germany have reported their findings, which will solve a long-standing problem in the design of micro- and nanoelectromechanical resonators, in the journal Nature Communications. The research team developed a finite-element-based numerical solver capable of predicting the design-limited damping of almost arbitrary mechanical resonators to resolve this problem.

The 2011 QIPC Young Investigator Award will be presented to an outstanding young researcher in the field of Quantum Information Processing and Communication during the QIPC international conference at ETH Zürich, September 5-9, 2011.

The award consists of a diploma and a lump sum of 4000€.

The award will be given to a researcher under the age of 35 for the best research recently published or presented at a major conference. Eligible researchers must be less than 35 years old on the 1st of September 2011.

The original motivation to build a quantum computer came from Feynman, who imagined a machine capable of simulating generic quantum mechanical systems—a task that is believed to be intractable for classical computers. Such a machine could have far-reaching applications in the simulation of many-body quantum physics in condensed-matter, chemical and high-energy systems.
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James Dacey at PhysicsWorld writes: ''In a fascinating case of physics being turned on its head, a group of researchers at Yale University in the US has created an "anti-laser" that almost perfectly absorbs incoming beams of coherent light. The invention is based on a theoretical study reported last summer in which Douglas Stone and his Yale colleagues claimed that such a system could be possible in a device that they call a coherent perfect absorber (CPA).

An EU-funded team of researchers has set out to provide mathematicians with their very own periodic table ... of shapes. Researchers at Imperial College London (ICL) in the UK are collaborating with colleagues in Australia, Japan and the Russian Federation to identify the basic building blocks of all possible shapes in the universe across three, four and five dimensions, and analyse how these components relate to each other.
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Belle Dumé at NanotechWeb writes: ''A new way to make complete and programmable logic circuits that combine both memory and logical processing in a single structure has been unveiled by physicists in Germany. Such structures could lead to smaller, faster and more energy-efficient integrated circuits and their development has been one of the main goals in spintronics – a relatively new technology that exploits the spin of an electron as well as its charge.