Quantum Mechanics as a Framework for Dealing with Uncertainty

Details Quantum Mechanics as a Framework for Dealing with Uncertainty Quantum Mechanics as a Framework for Dealing with Uncertainty

2010-04-17

arxiv.org/abs/1004.2985v1

Phys. Scr. T140 (2010) 014003 (7pp)

Physics

Quantum Physics

Plenary Lecture, Central European Workshop on Quantum Optics, Turku 2009.

Scientific paper

10.1088/0031-8949/2010/T140/0140

Quantum uncertainty is described here in two guises: indeterminacy with its concomitant indeterminism of measurement outcomes, and fuzziness, or unsharpness. Both features were long seen as obstructions of experimental possibilities that were available in the realm of classical physics. The birth of quantum information science was due to the realization that such obstructions can be turned into powerful resources. Here we review how the utilization of quantum fuzziness makes room for a notion of approximate joint measurement of noncommuting observables. We also show how from a classical perspective quantum uncertainty is due to a limitation of measurability reflected in a fuzzy event structure -- all quantum events are fundamentally unsharp.

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