Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Jarek Duda on 18/10/2020 08:33:43
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I have met statements that Stern-Gerlach experiment (https://en.wikipedia.org/wiki/Stern–Gerlach_experiment) can be seen as idealization of quantum measurement: we start with random direction of spin (continuous), end with parallel or anti-parallel alignment (discrete).
Is it a proper analogy/idealization of measurement? How to characterize the differences?
Are there some interesting different analogies?
In Stern-Gerlach we have magnetic dipole traveling in external magnetic field, what means torque (tau = mu x B) hence precession - additional energy e.g. kinetic ... unless parallel or anti-parallel alignement (tau=0), so can it be seen as radiation of excessive energy like for atom deexcitation?
ps. Recent "Tracking the Dynamics of an Ideal Quantum Measurement" https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.080401