出典:Wikipedia
出典:『Wikipedia』 (2011/05/16 23:06 UTC 版)
In mathematical physics quantum spacetime is the proposal that the actual spacetime that we live in is more accurately described not by usual local coordinates x,y,z,t but operator or algebra variables where the order of at least some of the products matters. The idea is borrowed from the canonical commutation relations in quantum mechanics where position and momentum variables x,p are mutually noncommutative, but is postulated now for relations between one or more of the spacetime variables themselves. Just as with Heisenberg's uncertainty principle, a quantum spacetime necessarily comes with uncertainty relations in the sense that not all x,y,z,t can simultaneously be ascribed actual numerical values.