Useful Thoughts and Actions Taken

Basic Polarized Photon Entanglement Experiment

This is the setup used in the Quantum Entanglement and Spooky Action at a distance video presentation with John Bell.

The basic experiment is a pair of entangled photons being put through two different detectors.  The simple version uses the Type -2 detectors of the Mermin Rhetorical homework problem.    The axis are shown in the diagram below. Let H and V be polarization eigenstates for horizontally and vertically polarized photons, and let R and L be polarization eigenstates for two orthogonal  right and left directions at 45 degrees so that……..

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By Fudgy McFarlen, ago

Video: The Secret Plot to Kill President William McKinley with Professor John Koerner

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On the 5th of September 1901 President William McKinley was assassinated by anarchist Leon Czolgosz. In spite of organised anarchist violence being a hallmark of this era, it has always been contended that Czolgosz acted alone. Today’s guest, history professor John Koerner contests this narrative. In his book, The Secret Plot to Kill McKinley, Professor Koerner peels back the layers to reveal a wider anarchist, and perhaps ultimately Republican Party plot, to dispense with America’s 25th President..

By Fudgy McFarlen, ago