New Semiconductor lasers — excellent news for Internet and medical technology.
Global stability analysis shows that new-generation semiconductor lasers may be dynamically more stable than conventional lasers despite having more degrees of freedom.
Continue reading “Stability of new-generation semiconductor lasers” »
More steps forward for QC through the discovery of a versatile effective spin system suitable for quantum simulations and universal quantum computation.
Using trapped atomic ions, we demonstrate a tailored and versatile effective spin system suitable for quantum simulations and universal quantum computation. By simply applying microwave pulses, selected spins can be decoupled from the remaining system and, thus, can serve as a quantum memory, while simultaneously, other coupled spins perform conditional quantum dynamics. Also, microwave pulses can change the sign of spin-spin couplings, as well as their effective strength, even during the course of a quantum algorithm. Taking advantage of the simultaneous long-range coupling between three spins, a coherent quantum Fourier transform—an essential building block for many quantum algorithms—is efficiently realized. This approach, which is based on microwave-driven trapped ions and is complementary to laser-based methods, opens a new route to overcoming technical and physical challenges in the quest for a quantum simulator and a quantum computer.
Listen up all my QC buddies; the air force wants to hear from you. You have QC ideas for fighter jets they want you.
Guess I need to submit them some of mine.
The Air Force wants white papers that describe new ways quantum computing could help achieve its mission, according to an amended Broad Agency Announcement posted Friday. Eventually, the government could provide a test-bed where a contractor might install, develop and test a quantum computing system, according to the announcement.
Last year, the Air Force announced it had about $40 million available to fund research into, and the eventual maintenance and installation of a quantum system — a branch of emerging computing technology that relies on the mechanics of atomic particles to process complex equations.
Continue reading “Air Force Seeks Ideas for How Quantum Computing Can Help Warfighters” »
The machine uses and studies 3D scans of the stockroom items to help it decide how to manipulate items. The arm got a near-flawless score in the stowing half of the event. Also, Delft was over three times faster at picking objects than last year’s champion (100 per hour versus 30).
The robots were scored on their ability to correctly select individual items from shelves. Picking items mixed in with other objects would score a contender more points. The items used represented a cross section of products commonly found in Amazon’s warehouses.
Continue reading “Deep Learning AI Leads Robot to Victory in Amazon’s Picking Challenge” »
““The Big Book of Science Fiction” doesn’t codify a genre the way the Vandermeers’ previous mega-anthology “The Weird” did. Many good science-fiction anthologies exist, though I can’t think of any quite this large or this internationally inclusive.”
So-called “zero-point energy” is a term familiar to some cinema lovers or series fans; in the fictional world of animated films such as “The Incredibles” or the TV series “Stargate Atlantis”, it denotes a powerful and virtually inexhaustible energy source.
Whether it could ever be used as such is arguable. Scientists at Jülich have now found out that it plays an important role in the stability of nanomagnets. These are of great technical interest for the magnetic storage of data, but so far have never been sufficiently stable. Researchers are now pointing the way to making it possible to produce nanomagnets with low zero-point energy and thus a higher degree of stability (Nano Letters, “Zero-Point Spin-Fluctuations of Single Adatoms”).
Why is gravity so much weaker than the other fundamental forces? A small fridge magnet is enough to create an electromagnetic force greater than the gravitational pull exerted by planet Earth. One possibility is that we don’t feel the full effect of gravity because part of it spreads to extra dimensions. Though it may sound like science fiction, if extra dimensions exist, they could explain why the universe is expanding faster than expected, and why gravity is weaker than the other forces of nature.
In our everyday lives, we experience three spatial dimensions, and a fourth dimension of time. How could there be more? Einstein’s general theory of relativity tells us that space can expand, contract, and bend. Now if one dimension were to contract to a size smaller than an atom, it would be hidden from our view. But if we could look on a small enough scale, that hidden dimension might become visible again. Imagine a person walking on a tightrope. She can only move backward and forward; but not left and right, nor up and down, so she only sees one dimension. Ants living on a much smaller scale could move around the cable, in what would appear like an extra dimension to the tightrope-walker.
“Ten years ago the very idea that you could manage your life through a small glass screen, was considered almost impossible. Now few of us would want to be without one. Two years ago talk of intelligent ships was considered by many as a futuristic fantasy. Today, the prospect of a remote controlled ship in commercial use by the end of the decade is a reality.”
