From: "Fred Chen" > Can there be a transition region where > both aspects are observable?
It is difficult to observe a one-particle pattern http://www.optica.tn.tudelft.nl/education/photons.asp But if you are interested in things like whether there is an experimental smooth, Yin-Yang type :-), transition between the particle-like and the wave-like behaviour, try the links below. Greenberger and Yasin wrote P^2 + V^2 = 1, where P is the *probability* for the particle taking one of the two possible paths, and V the visibility of the fringes. http://arxiv.org/abs/quant-ph/9908072 http://arxiv.org/abs/quant-ph/0311179 http://arxiv.org/abs/quant-ph/0201026 http://arxiv.org/abs/quant-ph/0404013 In other words, the Greenberger and Yasin relation states that the "entity" has a double nature (wave-like,particle-like) and that there is a "smooth" transition between one and the other nature. Following Greenberger and Yasin, we must restate the complementarity principle as *coexistence* between particle-like and wave-like properties, and not as reciprocal *exclusion*. (Btw, it is well known that Heisenberg was against the complementarity principle, since in matrix mechanics there are no waves at all ... It is also well known that the Bohr-Heisenberg debate, on this point, was very hard indeed).
