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In this book, we have discussed three quantum theories that solve the measurement problem and ground the statistical predictions of quantum mechanics in an objective and coherent description of Nature. Now it’s only natural to ask which of these theories is actually true. Why did our quest for an understanding of quantum mechanics lead us to three competing formulations rather than just one “final” version?

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  1. 1.

    Authors’ translation.

  2. 2.

    See, e.g., A. Ney and D.Z. Albert (eds.), The Wave Function: Essays on the Metaphysics of Quantum Mechanics. Oxford University Press, 2013.

  3. 3.

    A much discussed attempt to substantiate the “reality” of the wave function with a rigorous mathematical proof is the PBR theorem: M.F. Pusey, J. Barrett, and T. Rudolph, On the reality of the quantum state. Nature Physics 8, 475–478 (2012).

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Dürr, D., Lazarovici, D. (2020). Epilogue. In: Understanding Quantum Mechanics . Springer, Cham.

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