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The Pilot wave theory, also known as the de Broglie-Bohm Wave theory, or the causal interpretation, was one of the many interpretations of quantum mechanics in its early stages of conception and development. It was initially proposed by Louis de Broglie in his 1927 paper "Wave Mechanics and the Atomic Structure of Matter and Radiation", although this had been done only for a single particle. This theory was later developed by David Bohm. The theory suggests that all particles in motion are actually borne on a wave-like motion, similar to how an object moves on a tide. In this theory, it is the evolution of the carrier wave that is given by the Schrödinger equation. It is a deterministic theory and is entirely nonlocal. It is an example of a hidden variable theory, and all non-relativistic quantum mechanics can be accounted for in this theory. The theory was abandoned by de Broglie in 1932, and it gave way to the Copenhagen interpretation. The Copenhagen interpretation does not use the concept of the carrier wave or that a particle moves in definite paths until measurement is made. The Copenhagen Interpretation has stood the test of time as the widely accepted interpretation of Quantum Theory since then. ==Fluidic analogs to quantum mechanical experiments== However, an experiment conducted by Yves Couder and Emmanuel Fort, physicists at the Université Paris Diderot in 2006, involved millimeter scale fluid droplets. The droplets bounced up and down on a vibrated fluid bath. The experiment has revived the debate on the correct interpretation and formalism of quantum mechanics. Moreover, it is now considered that more experiments similar to Couder's can actually shed some light on the peculiar results of the Quantum theory. Couder's Experiment involves an oil-filled tray placed on a vibrating surface. The intensity is such that it is just below the intensity required for the formation of Faraday's Waves on the surface. On dropping a drop of the same fluid on the surface, the presence of an air film between the surface and the drop does not allow the two to coalesce. Thus, the droplet bounces on the surface, rather than simply losing its shape upon impact. This bouncing drop produces waves on the surface and these waves cause the droplet to move along the surface. This system was used to reproduce one of the most famous experiments in quantum mechanics, the double-slit experiment. Another analog was developed by a team of MIT researchers of a classic quantum experiment that involves confining electrons in a circular "corral" by a ring of ions. Instead of electrons, bouncing drops were used. Interestingly, the results in both the cases were similar to the quantum mechanical results. (Quantum Mechanical in Fluidic Macroscopic Experiments) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fluid analogs in quantum mechanics」の詳細全文を読む スポンサード リンク
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