Fermionic parton theory of Rydberg $${{\mathbb{Z}}}_{2}$$ Z 2 quantum spin liquids

Rydberg atoms arrayed on the ruby lattice have recently been used to realize a $${{\mathbb{Z}}}_{2}$$Z2 quantum spin liquid, yet pinning down the microscopic nature of this state remains an open question. Here, the authors classify all symmetry allowed $${{\mathbb{Z}}}_{2}$$Z2 quantum spin liquids using projective symmetry group theory, identify a candidate state through comparison with numerical calculations, and predict experimental signatures in the form of dynamical structure factors.