Artículos con la etiqueta ‘Principio de incertidumbre’

Uncertainty, incompleteness, chance, and design

Por • 30 ene, 2013 • Category: Filosofía

The 20th century has revealed two important limitations of scientific knowledge. On the one hand, the combination of Poincar\’e’s nonlinear dynamics and Heisenberg’s uncertainty principle leads to a world picture where physical reality is, in many respects, intrinsically undetermined. On the other hand, G\»odel’s incompleteness theorems reveal us the existence of mathematical truths that cannot be demonstrated. More recently, Chaitin has proved that, from the incompleteness theorems, it follows that the random character of a given mathematical sequence cannot be proved in general (it is ‘undecidable’). I reflect here on the consequences derived from the indeterminacy of the future and the undecidability of randomness, concluding that the question of the presence or absence of finality in nature is fundamentally outside the scope of the scientific method.

Physicists solve uncertainty about uncertainty principle

Por • 13 sep, 2012 • Category: Filosofía

“We designed an apparatus to measure a property — the polarization — of a single photon. We then needed to measure how much that apparatus disturbed that photo. To do this, we would need to measure the photon before the apparatus — but that measurement would also disturb the photon.” To overcome this well-known impasse, Rozema and his colleagues used a technique known as “weak measurement” in which the effect of the measuring device is itself too weak to measure.