A new theory suggests that the entire fabric of space and time is just a byproduct of how we measure information.
April 15, 2026
Original Paper
A Detector-Based Inference Framework for Quantum Theory and Spacetime Geometry
arXiv · 2604.10349
The Takeaway
We usually think of spacetime as a 'stage' where things happen, and detectors (like eyes or telescopes) as things that watch. This paper flips that upside down, proposing a framework where both quantum mechanics and Einstein's laws of gravity 'emerge' from a single structure based on measurement events. Essentially, the geometry of the universe might just be a consequence of how we distinguish one piece of information from another. It’s a radical rethink that suggests reality isn't 'out there' independent of us, but is instead built out of the very process of detection. If true, it would finally bridge the gap between quantum theory and gravity, the two most successful but incompatible theories in history.
From the abstract
We develop a detector-based framework in which quantum theory and spacetime geometry arise within a common inferential structure. Detector states and a detector kernel assign amplitudes to measurement events, allowing quantum theory to be interpreted as weighting hypothetical configurations consistent with observed detector clicks.Using a Gaussian detector model with phase structure, we show that distinguishability induces an information geometry on detector-state space, described by the quantum