Earlier in this QM-101 series I posted about quantum spin. That post looked at spin 1/2 particles, such as electrons (and silver atoms). This post looks at spin in photons, which are spin 1 particles. (Bell tests have used both spin types.) In photons, spin manifests as polarization.
Photon spin connects the Bloch sphere to the Poincaré sphere — an optics version designed to represent different polarization states. Both involve a two-state system (a qubit) where system state is a superposition of two basis states.
Incidentally, photon polarization reflects light’s wave-particle duality.
This post’s fill-in-the-blank title (given the “season” clue that we’re talking about television shows) might refer to any of at least three series, all coincidentally from Amazon Prime studios. In fact it refers to all three, although this post is only about two because 
I finished 
Retirement, along with online access to the library, has opened the door to exploring authors I’ve meant to read for ages. For example, I’d always meant to read one of my dad’s favorite books, 
History, location, and religion aside, the Wikipedia 
I’ve written 
“Danger, Will Robinson, Danger!”
The primary inspiration for this post, which I’ve been meaning to write since I started this blog, is a 1995 webpage titled 
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