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Atlantis Press eBooks

Strange Behaviour at Quantum Scale: The Full List

Theo van Holten

Published Dec 9, 2016• 0 citations
Publisher

Abstract

In the preceding chapter a few examples already have been given to illustrate the strange behaviour of particles at atomic scale.The present chapter gives a full account. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
DOI
10.2991/978-94-6239-234-2_2

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Atlantis Press eBooks•Dec 9, 2016•0 citations
Since its very beginning, quantum mechanics has been developed to deal with systems on the atomic or sub-atomic scale. For many decades, there has been no reason to think about its application to macroscopic systems. Actually, macroscopic objects have even been used to show how bizarre quantum effects would appear if quantum mechanics were applied beyond its original realm. This is, for example, the essence of the so-called Schrödinger cat paradox (Schrödinger, 1935). How-ever, due to recent advances in the design of systems on the meso- and nanoscopic scales, as well as in cryogenic techniques, this situation has changed drastically. It is now quite natural to ask whether a specific quantum effect, collectively involving a macroscopic number of particles, could occur in these systems. In this book it is our intention to address the quantum mechanical effects that take place in properly chosen or built “macroscopic” systems. Starting from a very naïve point of view, we could always ask what happens to systems whose classical dynamics can be described by equations of motion equivalent to those of particles (or fields) in a given potential (or potential energy density). These can be represented by a generalized “coordinate” φ( r , t ) which could either describe a field variable or a “point particle” if it is not position dependent, φ( r , t ) = φ( t ).
It may well be that you feel a bit disappointed at this point. You probably had heard about the utter magic of quantum theory, where particles may be in different places at the same time, where cats (Schrödinger’s cat) may be dead and alive at the same time, and where particles have a telepathic knowledge of the fate of remote particles.This chapter tells more about this “big magic”. These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.