As these results were obtained under ambient conditions they make diamond an ideal candidate for building a quantum computer working at room temperature. This seems to be impossible for other materials. The work is published in the prestigious magazine Science appearing on 6 June 2008.*)
Physicists describe the world of atoms by quantum mechanics. One of its strangest characteristics allows one to link two objects without any noticeable interaction even over long distances. No wonder Einstein called this a spooky interaction. Nowadays entanglement is proven to exist without doubt. One of the most spectacular experiments based on this unusual characteristic is quantum teleportation where the properties of one quantum object are transferred to another one at a remote location.
Nevertheless this effect is very sensitive to any perturbations. Thus physicists in most of the cases have to work under extreme conditions like temperatures close to the absolute Zero point to entangle quantum objects. This is not necessary in diamond, as has been shown by scientist from Stuttgart. In their experiments they shot Nitrogen atoms into the diamond lattice at high speed. These impurities are detectable by their fluorescence and they change the diamond color to pink. Because of its unmatched stiffness the diamond lattice is shielding the Nitrogen atoms and thus allows detecting quantum effects such as entanglement under ambient conditions.
This gave the researchers from Stuttgart the opportunity to create suitable quantum states among the building blocks of the diamond lattice, namely the Carbon atoms. One percent of those Carbon atoms possess a magnetic moment what allows them to interact with an implanted Nitrogen atom in close vicinity. This interaction was used to individually address the Carbon atoms which have been entangled in the end. This is one of the major milestones on the way towards a quantum computer, a technology supposed to build ultrafast computers.
Andrea Mayer-Grenu | alfa
CCNY physicists master unexplored electron property
26.07.2017 | City College of New York
Large, distant comets more common than previously thought
26.07.2017 | University of Maryland
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
26.07.2017 | Physics and Astronomy
26.07.2017 | Life Sciences
26.07.2017 | Earth Sciences