The measurement problem revisited

Olímpia Lombardi

Abstract Chapter 6 was devoted to argue that the MHI offers a solution to the measurement problem for both ideal and non-ideal measurements, and to show how it provides a distinction between reliable and non-reliable measurements in the non-ideal case. However, in the last decades more complex measurement scenarios have been considered, some as old as the so-called Wigner’s friend experiment, and others recently designed to test the theoretical predictions of quantum mechanics. For this reason, in the present chapter, the measurement problem is revisited from the perspective of the challenges that those scenarios pose to interpretation.

Lars‐Göran Johansson

Martin Miguel Ocampo, M. M. Miller Bertolami, Gabriel León

Abstract Among the open problems in fundamental physics, few are as conceptually significant as the “measurement problem” in Quantum Mechanics. One of the proposed solutions to this problem is the Continuous Spontaneous Localization (CSL) model, which introduces a non-linear and stochastic modification of the Schrödinger equation. This model incorporates two parameters that can be subjected to experimental constraints. One of the most notable consequences of this theory is the spontaneous heating of massive objects; this anomalous heating is dependent on the CSL parameters. In this work, we will revisit some astrophysical bounds previously found, and introduce new methods for testing the spontaneous heating in a variety of compact objects. Finally, we will compare our different bounds and discuss the benefits and shortcomings of each one.

Maximilian Schlosshauer

Mario Castagnino, Sebastián Fortín, Roberto Laura +1 more

The difficult issues related to the interpretation of quantum mechanics and, in particular, the "measurement problem" are revisited using as motivation the process of generation of structure from quantum fluctuations in inflationary cosmology. The unessential mathematical complexity of the particular problem is bypassed, facilitating the discussion of the conceptual issues, by considering, within the paradigm set up by the cosmological problem, another problem where symmetry serves as a focal point: a simplified version of Mott's problem.

Pieter E. Vermaas