No Quantum Process Can Explain the Existence of the Preferred Basis: Decoherence Is Not UniversalReportar como inadecuado




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Environment induced decoherence, and other quantum processes, have been proposed in the literature to explain the apparent spontaneous selection—out of the many mathematically eligible bases—of a privileged measurement basis that corresponds to what we actually observe. This paper describes such processes, and demonstrates that—contrary to common belief—no such process can actually lead to a preferred basis in general. The key observation is that environment induced decoherence implicitly assumes a prior independence of the observed system, the observer and the environment. However, such independence cannot be guaranteed, and we show that environment induced decoherence does not succeed in establishing a preferred measurement basis in general. We conclude that the existence of the preferred basis must be postulated in quantum mechanics, and that changing the basis for a measurement is, and must be, described as an actual physical process.

KEYWORDS

Quantum Mechanics, Measurement, Preferred Basis, Entanglement

Cite this paper

Inamori, H. 2016 No Quantum Process Can Explain the Existence of the Preferred Basis: Decoherence Is Not Universal. Journal of Quantum Information Science, 6, 214-222. doi: 10.4236-jqis.2016.63014.





Autor: Hitoshi Inamori

Fuente: http://www.scirp.org/



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