4 papers
Bose-Einstein condensate of two-dimensional excitons in a ring: Necklace-like modulation of order parameter
S. -R. Eric Yang, Q-Han Park, J. Yeo
We have studied theoretically the Bose-Einstein condensation (BEC) of two-dimensional excitons in a ring with small random width variation. We derive a nonlinear Gross-Pitaevkii eq…
Complex sine-Gordon Equation in Coherent Optical Pulse Propagation
Q-Han Park, H. J. Shin
It is shown that the McCall-Hahn theory of self-induced transparency in coherent optical pulse propagation can be identified with the complex sine-Gordon theory in the sharp line l…
Nonabelian sine-Gordon theory and its application to nonlinear optics
Q-Han Park, H. J. Shin
Using a field theory generalization of the spinning top motion, we construct nonabelian generalizations of the sine-Gordon theory according to each symmetric spaces. A Lagrangian f…
Spontaneous Breaking of Parity in 2+1-Dimensional Thirring Model
Y. M. Ahn, B. K. Chung, J. -M. Chung +1
A new aspect of the vacuum structure of 2+1-dimensional Thirring model is presented. Using the Fierz identity, we split the current-current four-Fermi interaction in terms of a mat…