Quantum weirdness (Introduction)

by David Turell , Tuesday, November 26, 2013, 15:22 (3796 days ago) @ David Turell

Like the zeno effect, in this case the particle wave is separated from its polarization. The cheshire cat has a smile wihout the body:- "the physicists take things a step further and show that there really is a quantum Cheshire Cat by proposing another experiment that limits the measurement-induced disturbance. In this proposed experiment, the physicists take advantage of the tradeoff between disturbance and precision by performing a so-called "weak" measurement—one that is not very precise, but causes very little disturbance. -In this proposed set-up, the detectors used in the previous two experiments are replaced by a CCD camera and an optical element, both of which cause very little disturbance. Now, when the photon's location and polarization are measured simultaneously, the results are identical to those of the original experiment: the photon is in the left arm while the polarization is in the right arm. -This finding means that separating a property from its object truly is a feature of quantum mechanics, and not only for photons. The physicists predict that the effect also holds for an electron and its charge or spin, as well as for an atom and its internal energy. Yet while the proposed optical experiment can be implemented with current technology (and the researchers hope it soon will be), realizing the electron version is beyond the reach of current technology."-Read more at: http://phys.org/news/2013-11-physicists-quantum-cheshire-cats-paradoxes.html#jCp