Quantum engineering pushes refrigerator beyond classical efficiency limits. (Phys.org) —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. 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. 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.
Unlocking nature's quantum engineering for efficient solar energy. (Phys.org)—Quantum scale photosynthesis in biological systems which inhabit extreme environments could hold key to new designs for solar energy and nanoscale devices.
Certain biological systems living in low light environments have unique protein structures for photosynthesis that use quantum dynamics to convert 100% of absorbed light into electrical charge, displaying astonishing efficiency that could lead to new understanding of renewable solar energy, suggests research published today in the journal Nature Physics. Gravitational-wave finding causes 'spring cleaning' in physics. Detlev van Ravenswaay/Science Photo Library.
Quantum world record smashed. 14-Nov-2013 [ Print | E-mail ] Share [ Close Window ] Contact: University of Oxford Press Officepress.firstname.lastname@example.org 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. 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. 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.
"Things on a very small scale behave like nothing you have direct experience about. Carver Mead never has.
Who the fuck knows. Simple Explainations of Quantum Mechanics. Dark Matter. Speed of Light. Black Holes. Antimatter experiments present progress. At CERN today, representatives of the experiments that use beams from the Antiproton Decelerator presented their progress in 2012, and their plans for the New Year.
Michael Doser started proceedings with an update from the AEGIS experiment, which aims to measure the gravitational interaction between matter and antimatter. Doser described how in 2012 the AEGIS team tested their experimental setup using antiprotons and used other measurements to design an optimal layout for their experiment. "Beam times were extremely valuable in understanding this new apparatus," says Doser.
"In 2013 we hope to continue testing and commissioning with electrons and positrons, to commission a laser system for spectroscopy, and to install a positronium test station. " AEGIS aims to be ready to form an antihydrogen beam by summer 2014. David Lunney of the Université de Paris Sud in Orsay, France, spoke on behalf of the GBAR project External Links icon. Einstein's gravity theory passes toughest test yet: Bizarre binary star system pushes study of relativity to new limits. (Phys.org) —A strange stellar pair nearly 7,000 light-years from Earth has provided physicists with a unique cosmic laboratory for studying the nature of gravity.
The extremely strong gravity of a massive neutron star in orbit with a companion white dwarf star puts competing theories of gravity to a test more stringent than any available before. Once again, Albert Einstein's General Theory of Relativity, published in 1915, comes out on top. At some point, however, scientists expect Einstein's model to be invalid under extreme conditions. Uncertainty at a grand scale. University of Southampton. New mathematical model links space-time theories Ref: 13/96 30 May 2013 A ‘black string’ black hole phenomenon.
Uncertainty revisited: Novel tradeoffs in quantum measurement. (Phys.org) —There is, so to speak, uncertainty about uncertainty – that is, over the interpretation of how Heisenberg's uncertainty principle describes the extent of disturbance to one observable when measuring another. More specifically, the confusion is between the fact that, as Heisenberg first intuited, the measurement of one observable on a quantum state necessarily disturbs another incompatible observable, and the fact that on the other hand the indeterminacy of the outcomes when either one or the other observable is measured is bounded. Recently, Dr. The future of physics: Beyond the numbers.