nLab
measurement

Measurement

Context

Physics

physics, mathematical physics, philosophy of physics

Surveys, textbooks and lecture notes


theory (physics), model (physics)

experiment, measurement, computable physics

Measurement

Idea

In principle, any interaction between two physical systems is a measurement, whereby each system measures the state of the other. In practice, we break the symmetry by treating one system as the real physical system SS of study and the other system as merely a measuring apparatus AA with the sole purpose of measuring SS. If the properties of AA are more directly observable than those of SS, then this is useful.

References

Last revised on May 19, 2019 at 10:05:49. See the history of this page for a list of all contributions to it.