  Quantum spin liquids (QSLs) are long-range entangled states of quantum
magnets which lie beyond the Landau paradigm of classifying phases of matter
via broken symmetries. A physical route to arriving at QSLs is via
frustration-induced quantum melting of ordered states such as valence bond
crystals or magnetic orders. Here, we show, using extensive exact
diagonalization (ED) and density-matrix renormalization group (DMRG) studies of
concrete $SU(2)$ invariant spin models on honeycomb, triangular and square
lattices, that chiral spin liquids (CSLs) emerge as descendants of triple-$Q$
spin crystals with tetrahedral magnetic order and a large scalar spin
chirality. Such ordered-to-CSL melting transitions may yield lattice
realizations of effective Chern-Simons-Higgs field theories. Our work provides
a distinct unifying perspective on the emergence of CSLs, and suggests that
materials with magnetic skyrmion crystal order might provide a good starting
point to search for CSLs.
