Quasinormal modes around the BTZ black hole at the tricritical   generalized massive gravity
  Employing the operator method, we obtain log-square quasinormal modes and frequencies of a graviton around the BTZ black hole at the tricritical point of the generalized massive gravity. The log-square quasinormal frequencies are also obtained by considering a finite temperature conformal field theory. This shows the AdS/LCFT correspondence at the tricritical point approximately. We discuss a truncation process to the unitary theory on the BTZ black hole background. 
Yong-Wan Kim, Yun Soo Myung, Young-Jai Park
hep-th gr-qc