 Resonant activation (RA) is a well-studied phenomenon in thermally activated barrier crossing events, where internal noise can constructively facilitate the barrier crossing .
<clarity>  Resonant activation (RA) is a well-studied phenomenon in thermally activated barrier crossing events, where internal noise can constructively facilitate the barrier crossing .
 Resonant activation (RA) is a well-studied phenomenon in physics where the internal noise of a system can constructively facilitate the barrier crossing .