Posts Tagged ‘electron spin’

Quantum entanglement

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The argument about entanglement goes back to Einstein. The notorious EPR (Einstein/Podolsky/Rosen) thought experiment of 1935 demonstrated that if quantum mechanics was correct then the determination of the state of one quantum particle could instantaneously and over any distance determine the state of another particle. This was afterwards referred to as entanglement or quantum entanglement.

Quantum states in avian brains

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Quantum states in avian brains Based on New Scientist, Rachel Courtland (Jan 22) & Ed Young (Nov. 27) The ability of some birds to navigate by means of the Earth’s magnetic field had been known for some time without the mechanism by which they achieved this being fully understood. In fact the mechanism may vary somewhat between species. Some may rely on the radical pair mechanism. With this, light excites two electrons in a molecule, and this pushes one of the electrons into another molecule. Read more […]