On locally finite orthomodular lattices

Let us denote by LF the class of all orthomodular lattices (OMLs) that are locally finite (i.e., L in LF provided each finite subset of L generates in L a finite subOML). We first show in this note how one can obtain new locally finite OMLs from the initial ones and enlarge thus the class LF . We find LF considerably large though, obviously, not all OMLs belong to LF . We then study states on the OMLs of LF . We show that local finiteness may to a certain extent make up for distributivity. We for instance show that if L in LF and if for any finite subOML K there is a state s : K to [0, 1] on K, then there is a state on the entire L. We also consider further algebraic and state properties of LF relevant to quantum logic theory.