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Living Near de Sitter Bubble Walls
Jin-Ho Cho, Soonkeon Nam
We study various bubble solutions in string/M theories obtained by double Wick rotations of (non-)extremal brane configurations. Typically, the geometry interpolates de Sitter spac…
String Pair Creations in D-brane Systems
Jin-Ho Cho, Phillial Oh, Cheonsoo Park +1
We investigate the criterion, on the Born-Infeld background fields, for the open string pair creation to occur in D-(anti-)D-brane systems. Although the pair creation occurs…
Superfield formalism for the one loop effective action and CP(N) model in three dimensions
Jin-Ho Cho, Sang-Ok Hahn, Phillial Oh +2
To obtain the one loop effective action for a given superfield theory, one encounters the notion such as the `supertrace' of a differential operator on superspace. We develop, in a…
Lineal Trails of D2-D2bar Superstrings
Jin-Ho Cho, Phillial Oh, Cheonsoo Park +1
We study the superstrings suspended between a D2- and an anti-D2-brane. We quantize the string in the presence of some general configuration of gauge fields over the (anti-)D-brane…
Rotating Supertubes
Jin-Ho Cho, Phillial Oh
We study the rotating tubular D2-brane as a time dependent supersymmetric solution of type-IIA string theory. We show that the Poynting angular momentum of the supertube can be rep…
Supersymmetric Boost on Intersecting D-branes
Jin-Ho Cho, Phillial Oh
We study the effect of the Born-Infeld electric field on the supersymmetric configuration of various composite D-branes. We show that the generic values of the electric field do no…