Boundary fields and renormalization group flow in the two-matrix model

Sean M. Carroll, Miguel E. Ortiz, Washington Taylor
1998 Physical Review D, Particles and fields  
We analyze the Ising model on a random surface with a boundary magnetic field using matrix model techniques. We are able to exactly calculate the disk amplitude, boundary magnetization and bulk magnetization in the presence of a boundary field. The results of these calculations can be interpreted in terms of renormalization group flow induced by the boundary operator. In the continuum limit this RG flow corresponds to the flow from non-conformal to conformal boundary conditions which has recently been studied in flat space theories.
doi:10.1103/physrevd.58.046006 fatcat:p2a6kmrrkzcwnhyyt7mjxq23lu