Big Mysteries in Physics Survey - Quantum Gravity

Ṁ225Ṁ194

resolved Jun 10

29%13%

No opinion

19%23%

String Theory/M-Theory (replacing point particles with extended objects in higher dimensions)

18%12%

Gravity is not quantum

13%5%

Loop Quantum Gravity (quantizing areas and volumes in spacetime)

11%21%

Other

5%5%

Asymptotic Safety (spacetime becomes a fractal on small scales)

3%6%

Causal Sets (Discrete spacetime atoms, only connected by causal relations)

1%9%

Hořava–Lifshitz Gravity (breaking speed of light limit at high energies)

1%6%

Causal Dynamical Triangulations (gluing triangulated space in layers of time)

Background. American Physical Society is holding a Big Mysteries in Physics Survey ( https://physics.aps.org/articles/v18/140) on the toughest questions facing physicists today. One among the questions is posed in this market.

Take the Big Mysteries in Physics Survey

Did time start at the big bang? What happens if you fall into a black hole? What explains the mysterious dark matter? Weigh in on the toughest questions facing physicists today.

Resolution. This market will resolve to the survey result (in percentages) once it becomes available to the public.

Consideration. For reference, the survey result for the same question at a physics conference held in 2024 is shown below (https://arxiv.org/abs/2503.15776). See also https://youtu.be/e7Rq_Vjhqu4?feature=shared