Macroscopic Quantum Systems and the Quantum Theory of Measurement

摘要: This paper discusses the question: How far do experiments on the so-called “macroscopic quantum systems” such as superfluids and superconductors test the hypothesis that the linear Schrödinger equation may be extrapolated to arbitrarily complex systems? It is shown that the familiar “macroscopic quantum phenomena” such as flux quantization and the Josephson effect are irrelevant in this context, because they correspond to states having a very small value of a certain critical property (christened “disconnectivity”) while the states …