Quantum Physics
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Uncertainty at a grand scale | Atom & Cosmos
Macro test of Heisenberg’s principle may aid hunt for gravitational waves By Andrew Grant Web edition: February 14, 2013 Print edition: March 23, 2013; Vol.183 #6 (p. 16) The Heisenberg uncertainty principle, a tenet of quantum mechanics, has been demonstrated at scales visible to the naked eye. The research, described in the Feb. 15 Science , could help scientists detect minuscule perturbations in the fabric of space caused by merging black holes.
Forget cracking crypto, think modelling reality itself to help build a better one The problem with trying to explain quantum computing to the public is that you end up either simplifying the story so far as to make it wrong, or running down so many metaphorical rabbit-burrows that you end up wrong. So The Register is going to try and invert the usual approach, and try to describe quantum computing at a more materialistic level: how do you build one, and when it’s built, how do you use it? Hopefully, a concrete framework will make it easier to understand quantum computing along the way.
What are quantum computers good for?
Nov 01, Physics/Quantum Physics What is light made of: waves or particles? This basic question has fascinated physicists since the early days of science.
'One real mystery of quantum mechanics': Physicists devise new experiment
Team send a single proton 97km in China, while a second team in the Canary Islands claims to have reached 143km Breakthrough could lead to ultra fast communication systems By Mark Prigg PUBLISHED: 17:43 GMT, 10 August 2012 | UPDATED: 17:56 GMT, 10 August 2012 Two teams of researchers have extended the reach of quantum teleportation to unprecedented lengths.
Researchers use teleportation to beam a single photon 97km
Could allow for medical scans without harmful X-rays Smallest possible object that can be photographed with visible light Shadow photograph took five years By Rob Waugh PUBLISHED: 10:04 GMT, 5 July 2012 | UPDATED: 10:12 GMT, 5 July 2012 A new ultra-high-resolution microscope has photographed the shadow of a single atom for the first time - an achievement which took five years.
Scientists photograph shadow of a single atom for the first time
CERN & the LHC
the Higgs boson
Nothingness
Scientist unlocks the quantum secrets of the moon's bizarre soil, which hangs suspended above the surface when touched
Soil would hang above the surface, withstand heat - and would stick to astronauts like glue By Eddie Wrenn PUBLISHED: 07:51 GMT, 20 June 2012 | UPDATED: 10:44 GMT, 20 June 2012
The matter that's not not not there | Jon Butterworth | Life & Physics | Science
Purple haze shows dark matter flanking the 'Bullet Cluster'. Photograph: AP. Astronomers study the motion of stars in galaxies, as they twist and rotate under each other's gravitational attraction. The motion throws up a long-standing puzzle in astrophysics: The way the stars move indicates the presence of a certain amount of matter in the galaxies. But when you count up the matter in the visible stars, there isn't enough. This matter that's "not there" in the visible galaxy is called "dark matter".
Quantum interference of large organic molecules : Nature Communications
Experimental setup The particles are evaporated in a thermal source. Their velocity is selected using the gravitational free-fall through a sequence of three slits. The interferometer itself consists of three gratings G 1 , G 2 and G 3 in a vacuum chamber at a pressure of <10 −8 mbar. The first grating is a SiN x membrane with 90-nm wide slits arranged with a periodicity of =266 nm.
An octopus-shaped molecule is giving Schrödinger’s cat competition as the mascot of the bizarre world of quantum physics, where matter can simultaneously exist in different states. Physicist Erwin Schrödinger’s famous thought experiment posited that a cat behaving according to quantum principles could be dead and alive at the same time. We are spared such paradoxes because the rules of quantum physics seem confined to subatomic objects— in the human-scale world, a cat is either alive or dead. Now University of Vienna physicist Markus Arndt has designed an experiment suggesting that larger objects may also possess such strange quantum duality. Physicists can confirm that subatomic matter exists as both wave and particle by observing interference patterns, or overlapping waves.
#17: Quantum Weirdness Enters the Larger World | Subatomic Particles
