Dark energy with a space-condensate field
- 발행기관 서강대학교 일반대학원
- 지도교수 이범훈
- 발행년도 2016
- 학위수여년월 2016. 2
- 학위명 석사
- 학과 및 전공 일반대학원 물리학과
- 실제URI http://www.dcollection.net/handler/sogang/000000058941
- 본문언어 한국어
- 저작권 서강대학교 논문은 저작권보호를 받습니다.
초록/요약
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.
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