Physicist Jonathan Oppenheim has proposed a theory of post-quantum gravity that treats space-time as fundamentally non-quantum. The idea introduces random fluctuations in the flow of time that could connect general relativity with quantum mechanics.
Oppenheim, based at University College London, argues that gravity and space-time do not need to be broken into quanta like the other fundamental forces. Instead, space-time remains continuous, and its interaction with quantum systems produces unpredictable wobbles in time on very small scales.
These fluctuations emerge directly from the mathematics of the theory. When included in quantum calculations, they reproduce observed behaviors such as the apparent collapse of a quantum state upon measurement.
Testing the idea requires measuring tiny variations in gravitational strength between objects. Prototype experiments are under construction, though researchers estimate it could take decades to reach the needed precision.
Oppenheim acknowledges the theory remains controversial, noting that few colleagues currently view it as more likely than competing approaches. Several physicists nevertheless support carrying out the proposed tests because they can be performed in the laboratory.