157 citations · 232 across the 21 of their papers we have counts for
21 papers
Understanding the Complex Position in a PT-symmetric Oscillator
Jin-Ho Cho
We study how to understand the complex coordinates involved in the non-Hermitian but PT-symmetric systems. We explore a PT-symmetric oscillator model to show that the entire inform…
The Entropy Function for the extremal Kerr-(anti-)de Sitter Black Holes
Jin-Ho Cho, Yumi Ko, Soonkeon Nam
Based on the entropy function formalism, we consider the extremal Kerr-(anti-)de Sitter black holes in 4-dimensions. Solving differential equations exactly, which are obtained by e…
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…