Time Crystal: https://en.wikipedia.org/wiki/Time_crystal
/q discrete time crystal "retrocausality" https://www.google.com/search?q=discrete+time+crystal+%22ret...
Delayed choice quantum eraser: https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser
From https://news.ycombinator.com/item?id=28402527 :
> one must perform electrodynamic engineering in the time domain, not in the 3-space EM energy density domain.
And from https://news.ycombinator.com/item?id=35877402#35886041 :
> Physical observation (via the transverse photon interaction) is the process given by applying the operator ∂/∂t to (L^3)t, yielding an L3 output
... > FWIU electrons are most appropriately modeled with Minkowski 4-space in the time-domain; (L^3)t
Retrocausality > Physics: https://en.wikipedia.org/wiki/Retrocausality#Physics
Time Crystal: https://en.wikipedia.org/wiki/Time_crystal
/q discrete time crystal "retrocausality" https://www.google.com/search?q=discrete+time+crystal+%22ret...
Delayed choice quantum eraser: https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser
From https://news.ycombinator.com/item?id=28402527 :
> one must perform electrodynamic engineering in the time domain, not in the 3-space EM energy density domain.
And from https://news.ycombinator.com/item?id=35877402#35886041 :
> Physical observation (via the transverse photon interaction) is the process given by applying the operator ∂/∂t to (L^3)t, yielding an L3 output
... > FWIU electrons are most appropriately modeled with Minkowski 4-space in the time-domain; (L^3)t
Retrocausality > Physics: https://en.wikipedia.org/wiki/Retrocausality#Physics