We’re about to find out if reality snaps into place instantly or if it’s more like a slow, blurry transition.
March 20, 2026
Original Paper
If Quantum Measurements Are Secretly Continuous Nonunitary Processes, Weak Measurements Can Detect It
arXiv · 2603.18787
The Takeaway
Standard quantum mechanics assumes the 'collapse of the wave function' happens at a single instant. This paper proposes a way to use 'weak measurements' to detect if that collapse is actually a smooth, physical process that takes place over a measurable amount of time.
From the abstract
The standard approach to quantum measurements is to assume that they lead to effectively instantaneous collapse of the quantum state. However, if we assume that we are unable to enforce at what exact moment of time the measurement occurs due to a finite resolution of any time measurement device, at the level of the ensemble, the measurement would lead to an effectively nonunitary evolution involving a mixed state. Each individual ensemble member would face an instantaneous collapse at different