Chaos Bound and its violation in Black p-brane

Abstract: In this work, we have extensively investigated the dynamics of circular geodesic (chargeless massive particle) followed by the investigation of the pulsating classical string in the p-brane background. This study is a continuation of our previous work JHEP10(2023)189, in which we numerically identified the presence of chaos for a classical string hovering near generic p-branes ($p < 7$). Here, for a particle probe, we have found evidence of chaos in the vicinity of the horizon. Furthermore, we observed a violation of the well-known MSS bound in specific extremal p-branes; however, no such violation is seen in the non-extremal cases. Similar observations were made for the classical string, where the violation of the bound is significant near the horizon. Thus, our semi-analytical arguments demonstrate that chaotic dynamics in black p-branes exhibit the (generalized) universal bound with notable violations, regardless of whether a particle or classical string is used as a probe.