Semiclassical string solutions on 1/2 Bnps geometries

We study semiclassical string solutions on the 1/2 BPS geometry of type-IIB string theory characterized by concentric rings on the boundary plane. We consider both folded rotating strings carrying nonzero R-charge and circular pulsating strings. We find that unlike rotating strings, as far as circular pulsating strings are concerned, the dynamics remains qualitatively unchanged when the concentric rings replace AdS5xS5. Using the gravity dual we have also studied the Wilson loop of the corresponding gauge theory. The result is qualitatively the same as that in AdS5xS5 in the global coordinates where the corresponding gauge theory is defined on S3xR. We show that there is a correction to 1/L leading order behavior of the potential between external objects. (author)