This technique has two significant advantages over previous approaches that have entangled atoms with light: "The efficiency with which we produce entangled photons is quite high and in principle could be increased to over 99 percent," explains Northup. "But above all, what this setup lets us do is generate any possible entangled state." To this end, the frequency and amplitude of the laser light are carefully chosen so that target collective state of the ion and photon is reached
The Holy Grail of next generation computers is quantum computing, which promises to revolutionise computing as we know it. One way of looking at it is as if it’s going to be the very latest super-computer compared to a 1940s bombe which broke the German Enigma codes in 1940. Except that there’s going to be one big difference. Quantum computers i.e. super-super-super-computers, thanks to graphene will be highly mobile, lightweight, and tiny (if a wanted trait,) compared to today’s super-computers.
The super quantum computer of tomorrow, might be as portable as a smart phone. And while all that computing power will change consumer electrics and the way we operate everything from internal combustion engines, to electric vehicles, avionics and shipping, it’s in the fields oc communication and of cutting edge further research, that quantum computers will really make the big difference. Super-computing steps from Newton into Einstein.
Despite a whole slew of graphene advances this year and last in the labs, involving quantum computers, this week’s advance announced by scientists at the University of Innsbruck's Institute for Experimental Physics promises to take quantum computing out of the labs late this decade, with massive changes coming early next decade. Out of sight of mainstream media the new carbon age is arriving, it’s just that decade long intellectual timeframes has been pushed out of mainstream media buy the cult of celebrity “culture.” An investing profit opportunity there for young investors willing to want more than a stag Facebook Flip.
Big Step Toward Quantum Computing: Efficient and Tunable Interface for Quantum Networks
ScienceDaily (May 23, 2012) — While several building blocks for a quantum computer have already been successfully tested in the laboratory, a network requires one additonal component: a reliable interface between computers and information channels. In the current issue of the journal Nature, physicists at the University of Innsbruck report the construction of an efficient and tunable interface for quantum networks.
Quantum technologies promise to redefine the landscape of information processing and communication. We already live in an information age, in which vast amounts of data are sent around the world over optical fibers, but future quantum networks may be many times more powerful. These networks will require interfaces that can transfer information from quantum processors onto light particles (photons). Such interfaces will allow optical fibers to transmit information-bearing photons between remote data registers, which are likely to be composed of quantum dots or ions.
—-Now, a research team led by Rainer Blatt, Tracy Northup, and Andreas Stute at the University of Innsbruck's Institute for Experimental Physics has demonstrated the first interface between a single ion and a single photon that is both efficient and freely tunable.
The Enigma and the Bombe
This website describes how the German Enigma enciphering machine was broken by the British bombe – the cryptanalytical machine designed by Alan Turing and Gordon Welchman at Bletchley Park, the centre of Allied codebreaking during World War II.
The bombes were neither the only, nor the first, method of breaking the Enigma but the breaks facilitated by the bombes from 1940 onwards yielded intelligence in a quantity unprecedented in military history and made a major contribution to Allied victory.
The Enigma was not the only enciphering machine employed by Germany in World War II. The other machines, the Siemens T52 Geheimschreiber and the Lorenz SZ40/SZ42 Schlüsselzusatz were codenamed STURGEON and TUNNY respectively at Bletchley Park. The traffic derived from TUNNY was known at Bletchley Park as FISH. TUNNY was initially broken by hand methods due to an extraordinary German error and later with the assistance of Heath Robinson, an experimental punched paper tape comparator incorporating about 30 valves. Having shown the comparison method of cryptanalysis to be workable, a second, more practical machine, called Colossus, was designed to break the FISH machines. Colossus was arguably the world's first electronic computer and incorporated about 1600 valves.
The cornucopia of intelligence gleaned from the Enigma breaks and from FISH was known as ULTRA.
University of Innsbruck
The Photonics group is lead by Prof. Gregor Weihs at the Institute for Experimental Physics at the University of Innsbruck. We conduct research in quantum optics, nonlinear optics, the optics of semiconductor nanostructures, and in addition we perform experiments on the foundations of (quantum) physics.