String theory as post-dicting gravity.
To what extent do these count as predictions, for hadronic physics via AdS-QCD and for condensed matter physics in AdS-CMT?
the application of mathematical techniques from string theory to the problem of heavy ion collisions is completely separate from the issue of whether string theory is a correct theory of fundamental particle physics. The stuff you’re talking about is just a clever new way of doing calculations in Standard Model physics. Even if it works, it doesn’t mean the universe is made of strings.
As opposed to this
String-theory skeptics could take the point of view that it is just a mathematical spinoff. However, one of the repeated lessons of physics is unity — nature uses a small number of principles in diverse ways. And so the quantum gravity that is manifesting itself in dual form at Brookhaven is likely to be the same one that operates everywhere else in the universe.
No difference in principle (here)
the predominance of the early story of the heterotic string, where realistic gauge fields exist in the bulk and no D-branes are present. In all other corners of the M-theory amoeba, (type IIA, IIB, I, M, , F) realistic HEP physics arises in exactly the same general way in which quantum supreme matter arises in AdS/CMT, namely, localized on coincident branes which sit at the center of AdS black brane throat geometries inside an Randall-Sundrum like bulk. Here the bulk strings are identified with the QCD-string “flux tubes”, completing – in a remarkable story going full circle – the historical origin of the idea of strings. Polyakov understood this qualitatively already in 1998 (“The wall of the cave”), and is has been brought out in quantitative detail through the modern WSS-model, and its variants, in AdS/QCD.
Mike Blake, Yingfei Gu, Sean A. Hartnoll, Hong Liu, Andrew Lucas, Krishna Rajagopal, Brian Swingle, Beni Yoshida, Snowmass White Paper: New ideas for many-body quantum systems from string theory and black holes (arXiv:2203.04718)
It also enabled quantum gravity to make surprising predictions about quantum information theory [154].
the interface between black hole physics and many-body quantum systems has developed significantly over the past decade. This interface is ultimately possible because of the intrinsically thermodynamic nature of classical gravity as well as the microscopic grounding of this thermodynamics in string-theoretic holographic duality.
It is already familiar that the existence of hadrons – which we can see, e.g. via the tracks they leave in bubble chambers – is explained by hypothetical constitutents termed “quarks” that nobody has ever seen or even indirectly detected. One shouldn’t forget this: Just because everybody got used to saying “quark”, they have never been seen.
All that is being added here to this story of the unseen quarks is that the unseen flux tubes connecting them actually extend into an unseen bulk spacetime.
The claim is that this little addition to the quarks picture completes its explanatory power to the non-perturbative regime.
Last revised on November 7, 2022 at 15:34:59. See the history of this page for a list of all contributions to it.