Wave-Particle Duality : A Case Study
Many introductory courses in Quantum Mechanics -whether or not they choose an historical perspective- begin with an “experiment” exhibiting the wave-particle duality of the behaviour of matter . This experiment is usually presented as in Fig. 1.a and Fig. 1.b.
KeywordsBeam Splitter Light Pulse Path Difference Photon State Usual Source
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- In that case, the fact that the experiment is dealing with particles is taken as evident, which is quite reasonable in some cases (with electrons or neutrons for instance). We however think that the discussion is more convincing when an experiment like (1.b) is presented (at the microscopic level, we do not see the particle, so how do we know that it is a particle ?).Google Scholar
- Wave effects (diffraction) have already been observed with atoms. However, no simple two-waves interference has yet been observed.Google Scholar
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