Tachyon condensation due to domain-wall annihilation in Bose-Einstein condensates.
We show theoretically that a domain-wall annihilation in two-component Bose-Einstein condensates causes tachyon condensation accompanied by spontaneous symmetry breaking in a two-dimensional subspace. Three-dimensional vortex formation from domain-wall annihilations is considered a kink formation in subspace. Numerical experiments reveal that the subspatial dynamics obey the dynamic scaling law of phase-ordering kinetics. This model is experimentally feasible and provides insights into how the extra dimensions influence subspatial phase transition in higher-dimensional space.
Graduate School of Integrated Arts and Sciences, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima 739-8521, Japan. hiromitu@hiroshima-u.ac.jp
Hiromitsu
H
Takeuchi
Kenichi
K
Kasamatsu
Makoto
M
Tsubota
Muneto
M
Nitta