Measurements according to Consistent Histories

• We critically analyze the treatment of measurements in Consistent Histories (CH).
• We find the treatment unsatisfactory since it relies on elements external to CH.
• It assumes that measurements always end up in states of well defined pointer position.
• We conclude that CH does not constitute a valid solution to the measurement problem.

We critically evaluate the treatment of the notion of measurement in the Consistent Histories approach to quantum mechanics. We find such a treatment unsatisfactory because it relies, often implicitly, on elements external to those provided by the formalism. In particular, we note that, in order for the formalism to be informative when dealing with measurement scenarios, one needs to assume that the appropriate choice of framework is such that apparatuses are always in states of well defined pointer positions after measurements. The problem is that there is nothing in the formalism to justify this assumption. We conclude that the Consistent Histories approach, contrary to what is claimed by its proponents, fails to provide a truly satisfactory resolution for the measurement problem in quantum theory.