Empirical status of Continuous Spontaneous Localization (CSL)

Determine whether the Continuous Spontaneous Localization (CSL) theory is empirically correct by conducting decisive experiments that either confirm CSL’s predictions or rule the theory out relative to standard quantum mechanics.

Background

CSL is a dynamical collapse modification of Schrödinger’s equation intended to resolve the measurement problem by producing definite outcomes through stochastic terms. Philip Pearle notes that despite decades of theoretical and experimental work, the current experimental record is inconclusive regarding CSL’s correctness.

This explicitly identifies an unresolved question about CSL’s validity, framing a clear experimental program to settle the matter by distinguishing CSL from standard quantum mechanics in appropriate regimes.

References

The experiments have neither proved CSL is correct nor ruled it out.

Three questions on the future of quantum science and technology  (2601.09769 - Radenkovic et al., 14 Jan 2026) in Section “DO YOU FIND THE QUANTUM MEASUREMENT PROBLEM WORTH STRIVING?”, contribution by Philip Pearle