A quantum system, left unmeasured, evolves according to the Schrodinger equation as a superposition, a mathematically precise combination of multiple possible outcomes at once. Measured, it yields a single definite result. What happens in between, and why measurement forces a choice at all, is called the measurement problem, and physics has never settled it. The Copenhagen interpretation treats collapse as a basic, unexplained feature of measurement. Many-worlds denies collapse altogether and has reality branch into all outcomes simultaneously. Objective collapse theories and pilot-wave mechanics offer still other pictures. Working physicists disagree, sometimes sharply, about which is correct, and no experiment has yet decided between them.
One historical interpretation, associated with John von Neumann and Eugene Wigner, proposed that consciousness itself is what triggers collapse, the observing mind being the one thing outside the physical system able to fix an outcome. It is worth being direct about this: the von Neumann-Wigner interpretation is a minority position within physics, has not gained broad acceptance, and is not what most physicists mean when they discuss the measurement problem today. It is also the version popular writing reaches for constantly, because it sounds like a bridge to spiritual claims. That popularity is not evidence in its favour, and this series will not lean on it.
What deserves the comparison instead is a more structural point. Drig drishya viveka, the discrimination of seer from seen, applies a single test to everything that appears in experience: whatever can be observed is, by that very fact, not the observer. Pushed all the way, this leaves a witnessing function, the sakshi, that can never itself become an object within its own field of view, structurally excluded from the class of things it observes.
The genuine, narrower parallel is this: physics independently keeps running into difficulty giving a complete, self-contained account of measurement from entirely within the system being measured, and Vedanta independently keeps finding that the observing function cannot be fully objectified from inside the field it observes. That is not the same claim, and one is not evidence for the other. But the recurrence of an observer that resists being folded cleanly into what it observes, in two disciplines with no contact, is worth noticing on its own terms, without the shortcut to consciousness-collapses-wavefunctions that neither field’s best current evidence actually supports.
Part 6 of 20 — Series III: Through Two Lenses
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