  Inverse Anderson transitions, where the flat-band localization is destroyed
by disorder, have been wildly investigated in quantum and classical systems in
the presence of Abelian gauge fields. Here, we report the first investigation
on inverse Anderson transitions in the system with non-Abelian gauge fields. It
is found that pseudospin-dependent localized and delocalized eigenstates
coexist in the disordered non-Abelian Aharonov-Bohm cage, making inverse
Anderson transitions depend on the relative phase of two internal pseudospins.
Such an exotic phenomenon induced by the interplay between non-Abelian gauge
fields and disorder has no Abelian analogy. Furthermore, we theoretically
design and experimentally fabricate nonAbelian Aharonov-Bohm topolectrical
circuits to observe the non-Abelian inverse Anderson transition. Through the
direct measurements of frequency-dependent impedance responses and voltage
dynamics, the pseudospin-dependent non-Abelian inverse Anderson transitions are
observed. Our results establish the connection between inverse Anderson
transitions and non-Abelian gauge fields, and thus comprise a new insight on
the fundamental aspects of localization in disordered non-Abelian flat-band
systems.
