Space is geometric relationships. It is not made of anything.
… the focus is on how nature responds to measurement, not on what space is “made of”. You take a finite set of geometric information and describe how it evolves.
You can say it is discretized because the area and volume operators are quantum operators with discrete spectrum —- but probabilities can mix the outcomes so that they can vary continuously.
… Maybe the main lesson is don’t take it too literally when popular writers say “discrete”. There may not be anything material there to be discrete or continuous. Geometry might be about information, or making measurements.
— How could spacetime become discretised at the Planck scale?
— marcus
2012.03.19 Monday ACHK