In summary, the cheapest commercially available double slit experiment setup for quantum state experiments, such as with qubits, is a tube with a double slit and a monitor for output, which costs around $200. However, there are other options available, such as a household object or a homemade setup using a glass slide, a laser pointer, and a soot-covered slide. It is possible to create single-photon interference with a laser pointer, but it is important to use a monochromatic light source for accurate results. However, it is recommended to have a good understanding of classical interference before attempting to understand the quantum picture.
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rrogers
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Concerning the original question: Have you tried youtube? For instance
A lab tried to build its own Mach-Zehnder Interferometer experiment.. but the length of upper path and lower path has to be kept at the nano-meter level or both detector A and detector B would be triggered. A right setup should only have one detector trigger.. and they can't do it..
It is said 9 out of 10 use interfometer for which way path experiment. I'm looking for description of actual experiments (the 1 out of 10) where they use double slits.. single photon source.. and single photon detector.. why is single photon detector so difficult? and what is the complete setup for this test? So even if you hide a tiny camera in one of the slits.. the photon or electron knows? how about any that won't cause decoherence or is the explanation of the following correct?
"The principle of complementarity refers to the ability of quantum-mechanical entities to behave as particles or waves under different experimental conditions. For example, in the famous double-slit experiment, a single electron can apparently pass through both apertures simultaneously, forming an interference pattern. But if a`which-way' detector is employed to determine the particle's path,the interference pattern is destroyed.This is usually explained in terms of Heisenberg's uncertainty principle, in which the acquisition of spatial information increases the uncertainty in the particle's momentum, thus destroying the interference."
Is this explanation correct? If not, what is the correct explanation? Thank you.