7 thoughts on “Concision”

  1. The idea, …, is based on the fact that the vacuum is birefringent for neutrinos.

    1) I didn’t know that was true of neutrinos; and 2) that’s a clever attempt at explanation – even if the abstract summarizes the conclusion (I didn’t read the entire article but I assume they trying to distinguish a “phase” and “group” velocity of neutrinos based on their angular momentum in the same way light can have an FTL phase velocity but information cannot be sent FTL).
    When I was a grad student I became fascinated with geometric (Berry’s) phase. I thought I was on to something when I came up with a connection between light phase and solid angle swept out on the Poincare sphere. Turned out that – to people who worked with interferometers – it was routine.

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