The curricular material uses the OSP Spins program to show the effect of measurement on an ensemble of spin-1/2 particles. In the virtual experiment, a beam of spin-1/2 particles leaves an oven incident on one or multiple ideal analyzers (ideal Stern-Gerlach apparatus) the result of which is detected as a click on a detector.
Before performing these virtual experiments it is important to first look over the tutorial and the tutorial exercises.
NOTE: In these exercises a beam of spin-1/2 particles (in this case, electrons) leaves an oven incident on an ideal Stern-Gerlach apparatus oriented in a particular direction. The beam is then split into |+> and |−> components and each component is sent through a magnet (red) of unknown orientation and then on to another ideal Stern-Gerlach apparatus before being detected at the counters.
You may click on a blue SG apparatus to change its orientation, but black SG apparatus cannot have their orientation changed. The unknown magnets' strength can be changed. The beam of electrons is sent through a magnet for a fixed time equal to t = 2πmec/36|e|. The number appearing on a magnet, therefore (see the tutorial) represents ωt in degrees.
You can change the strength of a magnet by clicking on the number or by clicking the number and holding down the mouse.
Navigate to the files within this directory to access the exercises and the simulations.