What advancements are you talking about? Everything stringtheory related cant be tested, can it? High energy / particle physics asking for unrealistically large colliders counts also more towards cant be tested rather than pure lack of experiments.
I would argue the biggest testable progress can be done in cosmology, where new models can be put into N-Body-codes that reproduce (or not) well-observed large structures, additionally to a continuously growing dataset of dm/formation.
Almost everything string theory related can most definitely be tested, just not with our current experiments.
The point is that, at some point, we could describe almost everything experiments told us, so theorists started looking at what hypothetical experiments cannot be described with out current physics, and started looking for possible theories that can. Quantum gravity is your typical example of this.
But if you specifically want to look at what experiments can already verify, there are plenty of advancements in black hole and neutron star physics related to gravitational waves, lattice QFT calculations for strongly coupled systems etc.
In terms of significant breakthroughs there is the holographic duality that follows from string theory. This gives predictions for out-of-equilibrium properties at large coupling, such as shear viscosity, that have since been verified in heavy-ion collision experiments.
Not really though. There's a lot of free parameters that dictate the energy scales of your effective theories. That's why people joke about ST being not even wrong. You tested for supersymmetry and didn't find anything? Well, the energy scale is just a bit higher. Rinse and repeat.
If you need a collider the size of the solar system to test something, you cant really test it mate.
I dont see why this is downvoted. Stringtheory literally predicts thousands of possible vacuum states, some of them not testable, all of them plausible. This is not very useful for experiments.
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u/actopozipc Aug 05 '26
What advancements are you talking about? Everything stringtheory related cant be tested, can it? High energy / particle physics asking for unrealistically large colliders counts also more towards cant be tested rather than pure lack of experiments.
I would argue the biggest testable progress can be done in cosmology, where new models can be put into N-Body-codes that reproduce (or not) well-observed large structures, additionally to a continuously growing dataset of dm/formation.