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What does it take to solve the measurement problem?

Jonte R. Hance, S Hossenfelder

Published Oct 11, 2022• 0 citations
Publisher

Abstract

We summarise different aspects of the measurement problem in quantum mechanics. We argue that it is a real problem which requires a solution, and identify the properties a theory needs to solve the problem. We show that no current interpretation of quantum mechanics solves the problem, and that, being interpretations rather than extensions of quantum mechanics, they cannot solve it. Finally, we speculate what a solution of the measurement problem might be good for.

DOI
10.25405/ncl.34496388

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We summarise different aspects of the measurement problem in quantum mechanics. We argue that it is a real problem which requires a solution, and identify the properties a theory needs to solve the problem. We show that no current interpretation of quantum mechanics solves the problem, and that, being interpretations rather than extensions of quantum mechanics, they cannot solve it. Finally, we speculate what a solution of the measurement problem might be good for.
Abstract Although much has been written about the measurement problem, there is still significant disagreement about what the problem really is and what a solution should look like. In this chapter I present a brief introduction to quantum mechanics and the measurement problem, and then I argue that the measurement problem should be understood in part a problem of epistemology: solving the problem requires telling a consistent story about how the reality underlying quantum mechanics could allow us to reliably come to know about that reality via the medium of our empirical evidence for quantum mechanics, and an interpretation of quantum mechanics which fails to achieve this is self-undermining.
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Abstract In rough terms, the quantum measurement problem is the problem of explaining how, when a system in a superposition state is measured, the pointer observable of the measuring apparatus is always found in a definite value. Although quantum mechanics involves several interpretative challenges, the measurement problem has been the main focus of the interest of physicists and philosophers working on the foundations of the theory: most interpretations were designed specifically to solve it. In this chapter, it is shown that the MHI offers a solution to the measurement problem for both ideal and non-ideal measurements, and that, in the non-ideal case, the interpretation distinguishes between reliable and non-reliable measurements. I have also explained how the MHI accounts for consecutive measurements. Finally, it is emphasized that the MHI approach provides a new, more physical understanding of the concept of quantum measurement.