Back to Turing’s crypto model, expressed by physics
lecture 11, bala
When discussing the coherent states of light (in a lecture that comes on the heels of her discussion of the compressed quantum-only state) her argument starts out, Turing like, asking about the expected value of a+.a – whose mean is 1. She shows the ket and then the bra form of the eigenvector equations, and then puts the two back to back indicating that the amplitudes can be a representation of a wheels probability distribution.
In physics terms HOWEVER, the value is the intensity of the light.
Remember the discussion of the WWII-era NSA 5205 cryptanalyzer, that used a light intensity detector to do counting superpositions of depths.
Now project that forward to world in which lasers are being used (rather than light bulges and photodiodes… No longer are folks layering lots of hollywood film together (and running through the light projected at high-speed, with an
Remember GCCS considered building this device but it never happened, since