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Quantum world record smashed

Quantum world record smashed
14-Nov-2013 [ Print | E-mail ] Share [ Close Window ] Contact: University of Oxford Press 44-186-528-3877University of Oxford A normally fragile quantum state has been shown to survive at room temperature for a world record 39 minutes, overcoming a key barrier towards building ultrafast quantum computers. An international team including Stephanie Simmons of Oxford University, UK, report in this week's Science a test performed by Mike Thewalt of Simon Fraser University, Canada, and colleagues. In the experiment the team raised the temperature of a system, in which information is encoded in the nuclei of phosphorus atoms in silicon, from -269 °C to 25 °C and demonstrated that the superposition states survived at this balmy temperature for 39 minutes – outside of silicon the previous record for such a state's survival at room temperature was around two seconds. There is still some work ahead before the team can carry out large-scale quantum computations. Related:  risullyQuantum Mechanics - unreadvenkatramanan

Gravitational-wave finding causes 'spring cleaning' in physics Detlev van Ravenswaay/Science Photo Library Artist's rendering of 'bubble universes' within a greater multiverse — an idea that some experts say was bolstered with this week's discovery of gravitational waves. On 17 March, astronomer John Kovac of the Harvard-Smithsonian Center for Astrophysics presented long-awaited evidence of gravitational waves — ripples in the fabric of space — that originated from the Big Bang during a period of dramatic expansion known as inflation. By the time the Sun set that day in Cambridge, Massachusetts, the first paper detailing some of the discovery’s consequences had already been posted online1, by cosmologist David Marsh of the Perimeter Institute for Theoretical Physics in Waterloo, Canada, and his colleagues. Cosmologist Marc Kamionkowski of Johns Hopkins University in Baltimore, Maryland, agrees that some axion models no longer work, “because they require inflation to operate at a lower energy scale than the one indicated by BICEP2”. Linde agrees.

New Experiments to Pit Quantum Mechanics Against General Relativity It starts like a textbook physics experiment, with a ball attached to a spring. If a photon strikes the ball, the impact sets it oscillating very gently. But there’s a catch. Before reaching the ball, the photon encounters a half-silvered mirror, which reflects half of the light that strikes it and allows the other half to pass through. What happens next depends on which of two extremely well-tested but conflicting theories is correct: quantum mechanics or Einstein’s theory of general relativity; these describe the small- and large-scale properties of the universe, respectively. In a strange quantum mechanical effect called “superposition,” the photon simultaneously passes through and reflects backward off the mirror; it then both strikes and doesn’t strike the ball. But according to general relativity, gravity warps space and time around the ball. Knowing what happens to the ball could help physicists resolve the conflict between quantum mechanics and general relativity. Quantum Nature

Simple animation to explain complex principles 1, aircraft radial engine 2, oval Regulation 3, sewing machines 4, Malta Cross movement - second hand movement used to control the clock 5, auto change file mechanism 6, auto constant velocity universal joint 6.gif 7, gun ammunition loading system 8 rotary engine - an internal combustion engine, the heat rather than the piston movement into rotary movement # Via World Of Technology. 1, inline engine - it's cylinders lined up side by side 2, V-type engine - cylinder arranged at an angle of two plane 3, boxer engine - cylinder engine arranged in two planes relative

Carver Mead's Spectator Interview From American Spectator, Sep/Oct2001, Vol. 34 Issue 7, p68 Carver Mead The Spectator Interview Once upon a time, Nobel Laureate leader of the last great generation of physicists, threw down the gauntlet to anyone rash enough to doubt the fundamental weirdness, the quark-boson-muon-strewn amusement park landscape of late 20th-century quantum physics. Carver Mead never has. As Gordon and Betty Moore Professor of Engineering and Applied Science at Caltech, Mead was Feynman's student, colleague and collaborator, as well as Silicon Valley's physicist in residence and leading intellectual. Perhaps more than any other man, Mead has spent his professional life working on intimate terms with matter at the atomic and subatomic levels. While pursuing these researches, Mead responded to a query from Intel-founder Gordon Moore about the possible size of microelectronic devices. Among whom was Albert Einstein.

Quantum engineering pushes refrigerator beyond classical efficiency limits ( —The laws of thermodynamics determine what is possible and impossible in classical systems. Lately, scientists have been working on establishing quantum analogues of these fundamental laws to determine the performance limits of quantum systems. Now in a new study, scientists have established the thermodynamic limits on quantum absorption refrigerators, and then somewhat counterintuitively show how quantum engineering techniques can push the refrigerators beyond these limits, resulting in superefficient cooling. The findings show how quantum enhancements can allow quantum systems to exceed what is classically achievable, and marks a promising step toward the development of practical quantum cooling technologies. The researchers, Luis A. Correa, et al., from the University of La Laguna in Spain and the University of Nottingham in the UK, have published their paper on quantum-enhanced refrigeration in a recent issue of Nature Scientific Reports. More information: Luis A.

Make a Mandala Mandalas are used in many spiritual traditions, most notably within Tibetan Buddhism but also within Native American traditions. Modern Jungian psychology also uses the mandala as a way of exploring the hidden recesses of self. The mandala has been described as: "The Sacred sphere: The Union of the Self and the Universe" "A Perfect Sacred Sphere" "A Source of Cosmic Power " "A Permanent Abode of Enlightened Beings" "A Place where Microcosm and Macrocosm Unite " You can create your own mandala, expressive of your own life and values. Here are a few select sites I would recommend: Patrick A. There are also many books available about mandalas: Other books on mandalas can be found through Begin by building the basic geometric framework of your mandala. If you are not much of an artist, don’t fret. Once you've got the basic framework done, you can fill it in with various symbolic images and colors uniquely important to you. Feel free to be as creative as you care to. return to lecture notes

New qubit control bodes well for future of quantum computing (—Yale University scientists have found a way to observe quantum information while preserving its integrity, an achievement that offers researchers greater control in the volatile realm of quantum mechanics and greatly improves the prospects of quantum computing. Quantum computers would be exponentially faster than the most powerful computers of today. "Our experiment is a dress rehearsal for a type of process essential for quantum computing," said Michel Devoret, the Frederick William Beinecke Professor of Applied Physics & Physics at Yale and principal investigator of research published Jan. 11 in the journal Science. In quantum systems, microscopic units called qubits represent information. The Yale physicists successfully devised a new, non-destructive measurement system for observing, tracking and documenting all changes in a qubit's state, thus preserving the qubit's informational value. "As long as you know what error process has occurred, you can correct," Devoret said.

World's First Entanglement-Enhanced Microscope One of the exciting possibilities of quantum mechanics is the ability to measure the world far more precisely than with classical tools. Today, Takafumi Ono and pals at Hokkaido University in Japan say they’ve exploited this to create the world’s first entanglement-enhanced microscope. Their new toy produces images with entangled photons that are significantly sharper than those possible with ordinary light alone. Entanglement is the strange quantum property in which two particles share the same existence, even though they may be far apart. This works by focusing two beams of photons into spots next to each other on a flat sample and measuring the interference pattern they create after they have been reflected. It is then possible to work out the shape of the surface by analysing the change in the interference pattern as the spots move across it. The difference in phase of photons can be measured with huge accuracy, but even this has a limit, known as the standard quantum limit.

Radia 2 G Tapes Trigger Corporate IT Involvement Probe I have written some posts,about 80, filed under Radia Tapes,Karunanidhi providing a detailed analysis of the 2 G scam and the other criminality involved. The Corruption, manipulation and absolute misuse of Government machinery by the Corporate Houses is mind-boggling confirming the fact that the country is for the taking by the moneyed, aided by the Bureaucrats and politicians. 2 G Scam triggers more probes Now the Supreme Court has asked the CBI to investigate some more case, which involves Corporate and the Income Tax Department. It has come to light, which should have been at the first instance of listening to the Tapes,that there have been more deals fixed by Radia than the mere 2 G fraud. Income Tax department went out-of-the-way to favor her, even after the 2G Scam surfaced and the trial was on! These are the cases , where the Supreme Court case feels that there is a prima facie ground for a detailed inquiry. * Working of touts middlemen and kickbacks in the aviation sector Related:

New data confirms: Neutrinos are still traveling faster than light "It is worth pointing out, however, that the latest arXiv preprint lists 179 authors, while the original lists 174. Would you ever classify five people as "most of" 15? To make things more confusing . . . "four new people" have decided not to sign, according to Science. Now, none of the above numbers may match up . . .." The original 174 include a duplicate " F. The new 179 includes 10 new names that didn't appear on the old paper.

Quantum dots provide complete control of photons: News: Research By emitting photons from a quantum dot at the top of a micropyramid, researchers at Linköping University are creating a polarized light source for such things as energy-saving computer screens and wiretap-proof communications. Polarized light – where all the light waves oscillate on the same plane – forms the foundation for technology such as LCD displays in computers and TV sets, and advanced quantum encryption. Normally, this is created by normal unpolarized light passing through a filter that blocks the unwanted light waves. At least half of the light emitted, and thereby an equal amount of energy, is lost in the process. A better method is to emit light that is polarized right at the source. This can be achieved with quantum dots – crystals of semiconductive material so small that they produce quantum mechanical phenomena. The micropyramid is constructed through crystalline growth, atom layer by atom layer, of the semiconductive material gallium nitride.