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Last updated on April 23, 2014 at 21:24 EDT

Latest Quantum measurement Stories

Quasars Could Be Used To Test Bell's Theorem
2014-02-21 11:59:55

Lee Rannals for redOrbit.com - Your Universe Online MIT researchers writing in the journal Physical Review Letters are proposing an experiment that could test Bell’s theorem. According to the scientists, the experiment could test the 50-year-old theorem to determine whether our universe is based on textbook laws of classical physics or less-tangible probabilities of quantum physics. Physicist John Bell wrote in 1964 that if the universe is based on classical physics, the...

2014-01-20 12:45:12

Measurement technology continues to show its potential for quantum information Until recently measuring a 27-dimensional quantum state would have been a time-consuming, multistage process using a technique called quantum tomography, which is similar to creating a 3D image from many 2D ones. Researchers at the University of Rochester have been able to apply a recently developed, alternative method called direct measurement to do this in a single experiment with no post-processing. The work...

2013-12-09 10:09:06

Popular television shows such as “Doctor Who” have brought the idea of time travel into the vernacular of popular culture. But problem of time travel is even more complicated than one might think. LSU’s Mark Wilde has shown that it would theoretically be possible for time travelers to copy quantum data from the past. It all started when David Deutsch, a pioneer of quantum computing and a physicist at Oxford, came up with a simplified model of time travel to deal with the paradoxes...

2013-11-26 15:08:20

Study sets out to demystify a selected set of objections targeted against quantum theory in the literature A colloquium paper published in EPJ D looks into the alleged issues associated with quantum theory. Berthold-Georg Englert from the National University of Singapore reviews a selection of the potential problems of the theory. In particular, he discusses cases when mathematical tools are confused with the actual observed sub-atomic scale phenomena they are describing. Such tools are...

Quantum Reality Is More Complex Than Previously Thought
2013-10-28 15:44:43

Faculty of Physics University of Warsaw Imagine you order a delivery of several glass vases in different colors. Each vase is sent as a separate parcel. What would you think of the courier if the parcels arrive apparently undamaged, yet when you open them, it turns out that all the red vases are intact and all the green ones are smashed to pieces? Physicists from the University of Warsaw and the Gdansk University of Technology have demonstrated that when quantum information is transmitted,...

The Dynamics Of Walking Droplets
2013-10-02 04:42:48

[ Watch the Video: Strange Behavior Of Bouncing Drops ] April Flowers for redOrbit.com - Your Universe Online It is possible to make a tiny droplet of fluid levitate on the surface of a vibrating bath, walking or bouncing across, according to a research team led by Yves Couder at the Université Paris Diderot. The droplets, propelled by their own wave fields, exhibit certain features previously thought to be exclusive to the microscopic quantum realm. This quantum-like behavior...

2013-07-29 16:42:20

MIT researchers expand the range of quantum behaviors that can be replicated in fluidic systems, offering a new perspective on wave-particle duality In the early days of quantum physics, in an attempt to explain the wavelike behavior of quantum particles, the French physicist Louis de Broglie proposed what he called a "pilot wave" theory. According to de Broglie, moving particles — such as electrons, or the photons in a beam of light — are borne along on...

2013-07-22 10:18:05

Quantum research pushes boundary by testing micro theory for macro objects Since Erwin Schroedinger's famous 1935 cat thought experiment, physicists around the globe have tried to create large scale systems to test how the rules of quantum mechanics apply to everyday objects. Researchers at the University of Calgary recently made a significant step forward in this direction by creating a large system that is in two substantially different states at the same time. Until this point,...

2013-05-21 10:38:03

JQI lab sets a new record for creating heralded photons HERALDING Entanglement, by general consensus of physicists, is the weirdest part of quantum science. To say that two particles, A and B, are entangled means that they are actually two parts of an inseparable quantum thing. An important consequence of this inherent kinship is that measuring a property of A (say, the particle's polarization) is necessarily to know the corresponding property of B, even if you're not there with a...

New Theory May Help Explain Why Nature Is Quantum
2013-05-14 12:41:52

Centre for Quantum Technologies at the National University of Singapore Like small children, scientists are always asking the question 'why?'. One question they've yet to answer is why nature picked quantum physics, in all its weird glory, as a sensible way to behave. Researchers Corsin Pfister and Stephanie Wehner at the Centre for Quantum Technologies at the National University of Singapore tackle this perennial question in a paper published 14 May in Nature Communications. We know...