There is a long history of correlation between ab initio calculations for nuclear physics and ab initio calculations for quantum chemistry/materials.
Take coupled cluster for example, remembering that a lot of people used to say "CCSD(T) is the gold standard in quantum chemistry":
The method was initially developed by Fritz Coester and Hermann Kümmel
in the 1950s for studying nuclear-physics phenomena, but became more
frequently used when in 1966 Jiří Čížek (and later together with Josef
Paldus) reformulated the method for electron correlation in atoms and molecules. It is now one of the most prevalent methods in quantum
chemistry that includes electronic correlation.
The coupled cluster technique is a convenient model for many-particle wavefunctions, whether those systems are sub-atomic, atomic or super-atomic.
One of the most beautiful things about physics is that models like the Schroedinger equation are quite "universal" and therefore it can be used to model nuclei, atoms, molecules, macro-molecules, and so on, unless you need such high-precision as to need QED (quantum electrodynamics), QFD (quantum flavordynamics: if the weak force is needed), QCD (quantum colordynamics: if the strong force is needed, usually not for what your question is about but for sub-nuclear physics), or QGD (quantum gravity). But even if you did need QED, remember that QED is also universal in the same sense, and is in fact used for atomic and molecular calculations, as you can see in the references within this and this, and QED calculations would still be called ab initio in the same sense as Schroedinger equation solutions are, it's just that in quantum chemistry we don't always need to go beyond the Schroedinger equation.
Additionally I would like to mention that I wrote here that a lot of the foundational development of DFT was done by particle physicists (and the second link also includes references to seminal work by particle physicist Murray Gell-Mann):
My answers here
and here also
show that much of the early DFT development was done on the uniform
electron gas, by particle physicists like Keith Brueckner and Jeffrey
Goldstone (these two were also important players in the coupled
cluster method, which is now developed and used much more by