Title : Dark energy with a space-condensate field
Time: 11월 30일 오후 5시 30분.
Abstract: Recent couple of decades, several observational results reported independently that the present Universe is on the epoch of acceleration expansion.The source for the acceleration is distinguished by the name of "Dark energy" because of it is totally away from the sources that are already known. The many types of candidates for dark energy are suggested. One of them is the Quintessence field model which can explain the 'late' and 'acceleration' behavior of the dynamic of present Universe with proper potential.The non-linear sigma model can be regarded as parametric extension of the Q-field model and we find that the non-linear sigma model gives more proper fits for the observational data than the Q-field. To show this, we compare our results to the PLANCK 2015 data using the equation of state parameter and to the Supernova Type Ia data using the distance modulus.