What are Physical States?

Por • 30 mar, 2019 • Sección: Educacion

Stephen Boughn

The concept of the physical state of a system is ubiquitous in physics but is usually presented in terms of specific cases. For example, the state of a point particle of mass m is completely characterized by its position and momentum. There is a tendency to consider such states as «real», i.e., as physical properties of a system. This rarely causes problems in classical physics but the notion of real quantum states has contributed mightily to the philosophical conundrums associated with quantum mechanics. The Einstein-Rosen-Podolsky paradox is a prime example. In fact, quantum states are not physical properties of a system but rather subjective descriptions that depend on the information available to a particular observer. This realization goes a long way toward resolving such dilemmas as Schrödinger’s cat, wave function collapse, quantum non-locality, and parallel universes.

arXiv:1903.10348v1 [physics.hist-ph]

History and Philosophy of Physics (physics.hist-ph); Quantum Physics (quant-ph)

Post to Twitter

Escribe un comentario