… Physicists have succeeded in closing the last local realistic loophole for systems of entangled photons.
In everyday life it is only natural that the properties of objects exist independent of being observed or not. The quantum world on the other hand is ruled by other laws: the property of a particle may be not be defined until the instant it is being measured, and two entangled particles seem to be connected in a non-local way over large distances. Various experiments worldwide have demonstrated this fundamental attribute of quantum theory. However, up to now last doubts could not be ruled out completely. Advocates of “local realism” by which the classical world is governed refer to several “loopholes” in order to save their world view. Now physicists from the group of Prof. Anton Zeilinger at the Institute of Quantum Optics and Quantum Information (IQOQI) in Vienna, Austria, have closed an important loophole in photonic experiments which use quantum entanglement to rule out a local realistic explanation of nature.
The results are published this week in Nature .
“Local realism” is a world view in which the properties of physical objects exist independent of whether or not they are observed by anyone (realism) and in which no physical influence can propagate faster than the speed of light (locality). In 1964, in one of the most important works in the history of the foundations of quantum theory, the Irish physicist John Bell proved theoretically that local realism is in contradiction with the predictions of quantum mechanics, and that the decision between these philosophically so radically different world views can be made by experiment. A certain inequality, the now famous “Bell inequality,” can be used for an experimental test. Quantum mechanics can violate the inequality, whereas local realism cannot.
In a Bell test, pairs of particles, e.g. photons, are produced. From every pair, one photon is sent to a party usually called Alice, and the other photon is sent to Bob. They each make a choice which physical property they want to measure, e.g. which direction of their photon’s polarization. For pairs that are quantum entangled, the correlations of Alice’s and Bob’s measurement outcomes can violate Bell’s inequality. Quantum entanglement – a term coined by the Austrian physicist Erwin Schrââdinger – means that neither photon taken by itself has a definite polarisation but that, if one party measures the polarisation of its photon and obtains a random result, the other photon will always show a perfectly correlated polarisation. Albert Einstein called this strange effect “spooky action at a distance.”…http://www.sciencedaily.com/releases/2013/04/130415094839.htm
I experienced spooky action at a distance tonight. A bottle of soap began rocking on its own near my kitchen sink. No breeze, no earthquake. I was about 5 ft away. The only thing that makes sense is that the slow moving soap from the top took a while to settle and after a certain balance point was reached, it started rocking.
I’ve had a key fly off of the wall in this very same room. The guy who installed the locks and had that key made had recently died in a car crash. The key was hanging on a sign that says, “life is what happens when you are busy making other plans.”
Soap. Dish soap. Could be a clue to something I’m working on…