  We consider equilibrium states of weakly coupled anharmonic quantum
oscillators on Z. We consider the Resolvent CCR Algebra introduced by
D.Buchholtz and H.Grundling, and we show that the infinite volume limit of
equilibrium states satisfies the KMS (Kubo-Martin-Schwinger) condition with
good regularity(= locally Fock representation).
  Uniqueness of the KMS states is proven as well.
