This concluding article synthesizes the ten contributions of this special issue and articulates the intellectual significance of what we call the “quantum turn” in the humanities. Each paper, ranging from anthropology, phenomenology, and literary studies to neuroscience, mathematical physics, and quantum information science, shares a set of underlying principles: noncommutativity, observation as interaction, path-integral causality, and the open-system view of indeterminacy. Together they reveal a new logical architecture of knowledge in which theory and interpretation are dynamically entangled. Philosophically, this shift reconfigures epistemology, ontology, and axiology by extending the notion of measurement from physics to human perception, cognition, and meaning-making. Technologically, the emergence of quantum computers as quantum simulators allows the internal logic of these models to be tested through genuine quantum interference, far beyond classical emulation. This capability makes the experimental humanities (where concepts can be simulated and observed within the apparatus itself) a tangible reality. The “quantum turn” thus represents not merely a metaphor but a concrete transformation in how we conceive, verify, and co-create knowledge in the twenty-first century.
