Quantum time superposition of photons moving forwards and backwards in time

arxiv.org

4 pointsfnordpiglet3 comments

Here's a starting point for people who might be interested in understanding why time feels like it travels in one direction even though lots of physics is time symmetric:

https://en.wikipedia.org/wiki/Arrow_of_time

our mathematical approximation of reality is symmetric in time, hence its predictive power (up to a point), but reality is not.

Serious ask HN: re; 'QUANTUM' --

I hear "quantum" used in so many various orthogonal ways, and I cant tell if they are all correct, or only one is.. but if only one is, I don't know which one it is>

May you please define "quantum" for me ELI5?

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