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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/226102
How weak values illuminate the role of “hidden” variables as predictive tools
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In this chapter we offer an introduction to weak values from a three-fold perspective: first, outlining the protocols that enable their experimental determination; next, deriving their correlates in the quantum formalism and, finally, discussing their ontological significance according to different quantum theories or interpretations. We argue that weak values have predictive power and provide novel ways to characterise quantum systems. We show that this holds true regardless of ongoing ontological disputes. And, still, we contend that certain “hidden” variables theories like Bohmian mechanics constitute very valuable heuristic tools for identifying informative weak values or functions thereof. To illustrate these points, we present a case study concerning quantum thermalization. We show that certain weak values, singled out by Bohmian mechanics as physically relevant, play a crucial role in elucidating the thermalization time of certain systems, whereas standard expectation values are “blind” to the onset of thermalization.
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OIANGUREN-ASUA, Xabier, et al. How weak values illuminate the role of “hidden” variables as predictive tools. Capítol del llibre: Oianguren-Asua. X.; Solé. Vol. ; Destefani, num. F, pags. (2025). ISBN 9780198901853. [consulted: 7 of June of 2026]. Available at: https://hdl.handle.net/2445/226102