Tunneling of Born-Infeld Strings to D2-Branes
  A Born-Infeld theory describing a D2-brane coupled to a 4-form RR field strength is considered, and the general solutions of the static and Euclidean time equations are derived and discussed. The period of the bounce solutions is shown to allow a consideration of tunneling and quantum-classical transitions in the sphaleron region. The order of such transitions, depending on the strength of the RR field strength, is determined. A criterion is then derived to confirm these findings. 
D. K. Park, S. Tamaryan, Y. -G. Miao, H. J. W. M\"uller-Kirsten