12 citations · 21 across the 4 of their papers we have counts for
5 papers
Negative-Tension Branes and Tensionless 1/2 Brane in Boundary Conformal Field Theory
Akira Ishida, Chanju Kim, Yoonbai Kim +1
In the framework of boundary conformal field theory we consider a flat unstable D-brane in the presence of a large constant electromagnetic field. Specifically, we study the cas…
Lower Dimensional Branes in Boundary Conformal Field Theory
Akira Ishida, Yoonbai Kim, Chanju Kim +1
In the presence of constant background electromagnetic fields, we discuss three types of exactly marginal boundary tachyon operators for static kinks in boundary conformal field th…
Unstable D-branes and String Cosmology
Chanju Kim, Hang Bae Kim, Yoonbai Kim +2
Cosmological implication of rolling tachyons is reported in the context of effective field theory. With a brief review of rolling tachyons in both flat and curved spacetimes, we st…
Cosmology of Rolling Tachyon
Chanju Kim, Hang Bae Kim, Yoonbai Kim +1
We study dynamics of rolling tachyon and Abelian gauge field on unstable D-branes, of which effective action is given by Born-Infeld type nonlocal action. Possible cosmological evo…
Comment on "Obstructions to the Existence of Static Cosmic Strings in an Abelian Higgs Model"
Chanju Kim, Yoonbai Kim
There has been considerable interest in the possible cosmic string configurations and Y. Yang has recently derived intriguing obstructions to the existence of cylindrically symmetr…