In quantum physics, the divisions between object and observer—the systems and environment—become blurred. Because any measuring device is governed by the laws of quantum mechanics, the act of measurement involves an interaction between two quantum systems. The exact mechanisms by which this works are still unclear in many instances, but much of the quasi-mystical language once used to describe quantum mechanics has given way to precise scientific descriptions. One remaining frontier is comprehension of how systems gradually lose coherence via interactions with their environment, which prevents their usefulness in quantum computing. A new set of experiments by Yinnon Glickman, Shlomi Kotler, Nitzan Akerman, and Roee Ozeri revealed part of the mechanism by which environment disrupts quantum systems: photons. They found that photons that interacted with a quantum system can end up correlated with the system's state, the hallmark of entanglement. By careful preparation of the atom's state, it may be possible to reduce the loss of quantum information to the environment, and thus extend the life of these systems.
Scientific American Quantum Teleportation in Space Explored as Message Encryption Solution Scientific American Einstein and two colleagues theorized in 1935 that if you had two quantum systems that interacted, such as two atoms in a molecule, and...
A group of European researchers has released the first version of a cloud computing platform for robots that will help them take advantage of powerful virtual resources. Essentially, they’re treating robots like any other device — desktop, tablet or mobile phone — running web applications, only robots can learn from each other and can do a lot more than just update screen displays. The project, carried out by a team at ETH Zurich, is called RoboEarth and its linchpin is a cloud software platform called Rapyuta. The way it works is pretty simple at a high level: robots communicate with a cloud-based application platform that carries out computation tasks and connects to a cloud database full of information such as maps, images, language, as well as to other web services. The robots themselves are pretty much hardware terminals equipped with sensors and moving parts but limited on-board processing power or data storage.
There was a time when science could be broken down into neat-and-tidy disciplines — straightforward things like biology, chemistry, physics, and astronomy. But as science advances, these fields are becoming increasingly specialized and interdisciplinary, leading to entirely new avenues of inquiry. Here are 11 emerging scientific fields you should know about.
Single photons will form an integral part of distributed quantum networks as flying qubits. First, they are the natural choice for quantum communication, as they carry information quickly and reliably across long distances. Second, they can take part in quantum logic operations, provided all the photons taking part are identical. Unfortunately, the quality of photons generated from solid-state qubits, including quantum dots, can be low due to decoherence mechanisms within the materials. With each emitted photon being distinct from the others, developing a quantum photonic network faces a major roadblock. Now, researchers from the Cavendish Laboratory at Cambridge University have implemented a novel technique to generate single photons with tailored properties from solid-state devices that are identical in quality to lasers.
Also a fellow of The Royal Society, Professor Hinton has become renowned for his work on neural nets and his research into “unsupervised learning procedures for neural networks with rich sensory input.” So what's the fuss?
From the properties of dark matter to how the universe took shape shortly after the Big Bang, some of the universe’s oldest and best-kept secrets could soon be exposed as construction moves forward on three “extremely large telescopes,” each with...
Scientists have demonstrated a quantum algorithm that performs a true calculation for the first time. Quantum algorithms could one day enable the design of new materials, pharmaceuticals or clean energy devices.
What is dark energy? More is unknown than is known — we know how much there is, and we know some of its properties; other than that, dark energy is a mystery — but an important one. Roughly 70% of the Universe is made of dark energy.
Jesse Silverberg, a graduate student at Cornell University in Ithaca, and two physics professors at Cornell are researching the science behind “what makes a crowd of people with independent decision-making powers behave like a random gas?