🚀 go-pugleaf

matmcinn@nuscc.nus.sg (Mcinnes B T (Dr)) writes...
>                                       But I do claim that many people
>think of gravitation as an "interaction". Which it is NOT; this being
>the main point of GR.

So what does the gravitation constant measure?

>                                  To ask, "why does the Earth go around
>the Sun?" is precisely analogous to asking Newton or Galileo why a free
>particle moves in a straight line at constant speed.

As Feynman was so fond of pointing out, Newton didn't know the answer.

>                                                           "Gravity" was
>all a mistake, resulting from our ignorance of spacetime curvature. How
>does one quantize a mistake?

Consider a Schroedinger's Cat apparatus where the box is large and contains
a mass distibution instead of a cat, and a mechanism to alter the mass
distribution if the nucleus decays. After a time the mass distribution
will be in a superposition of states. How will a test particle outside the
apparatus know how to fall?

Equivalently, does curvature couple to the energy momentum tensor (an operator)
or to its expectation value, or something else?

Dave Ring
dwr2560@zeus.tamu.edu