Misc,
On the uncertainty relations and quantum measurements: conventionalities, shortcomings, reconsiderations
(April 2005)
Abstract
Unsolved controversies about uncertainty relations and quantum measurements
still persists nowadays. They originate around the shortcomings regarding the
conventional interpretation of uncertainty relations. Here we show that the
respective shortcomings disclose veridic and unavoidable facts which require
the abandonment of the mentioned interpretation. So the primitive uncertainty
relations appear as being either thought fictions or fluctuations formulae.
Subsequently we reveal that the conventional approaches of quantum measurements
are grounded on incorrect premises. We propose a new approach in which : (i)
the quantum observables are considered as generalized stochastic variables,
(ii) the view is focused only on the pre-existent state of the measured system,
without any interest for the collapse of the respective state, (iii) a
measurement is described as an input-output transformation which modify the
probability density and current but preserve the expressions of the operators.
The measuring uncertainties are evaluated as changes in the probabilistic
estimators of observables. Related to different observables we do not find
reasons of principle neither for uncertainties-connections nor for measuring
compatibility/incompatibility.
