In the field of quantum gravity, spacetime may not be a fundamental building block but rather a phenomenon that emerges from entangled quantum states. A theoretical study released on arXiv in May 2026 proposes a way to diagnose this process using evanescent extremal surfaces—regions where quantum fluctuations reach a critical limit and suddenly stabilize.
A team of researchers from the Landau Institute for Theoretical Physics in Moscow and the University of British Columbia in Canada analyzed models of holographic duality. They performed numerical simulations on a Canadian supercomputer to track the behavior of extremal surfaces within spaces of negative curvature. When entanglement between regions hit a critical threshold, the surfaces became evanescent: their area ceased to fluctuate, marking the precise transition to classical spacetime.
Imagine a network of thousands of delicate threads, where each thread represents a quantum link. While these threads are tangled chaotically, the overall structure remains indistinct. However, as the connections solidify into a specific order, the entire network suddenly develops a rigid framework that can no longer be ignored. This is the exact leap captured by evanescent surfaces.
This method allows researchers to distinguish the genuine emergence of spacetime from simple quantum fluctuations. If these results are validated by future calculations, they will offer a new instrument for testing quantum gravity hypotheses without the need to construct a complete "theory of everything."
The work is based on preliminary data and requires further validation through other models. Nevertheless, it is already evident that diagnostics using evanescent surfaces provide a path toward directly observing how familiar geometry arises from quantum entanglement.
Every new simulation brings us closer to being able to measure the exact point where a quantum network transforms into the spacetime we experience every day.
