Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian - PowerPoint PPT Presentation

Nov 27, 2023 •370 likes •636 views

Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian arXiv.org/abs/1011.2528 The Standard Picture V 0 we are sitting at the bottom of a potential well Linde: chaotic inflation scalar field slow-rolls down potential Predicts n s

Slow-Roll Dark Energy J. Richard Gott, III and Zachary Slepian arXiv.org/abs/1011.2528
The Standard Picture V 0 we are sitting at the bottom of a potential well
Linde: chaotic inflation scalar field slow-rolls down potential Predicts n s =.967, r=.13
WMAP cosmic microwave background
WMAP
WMAP – Gott-Colley color scheme
WMAP & INFLATION
Primordial tilt & tensor/scalar ratio
Our Hypothesis Dark energy is a second epoch of inflation just like the first
D.E. Equation of State DEFINE W = RATIO OF PRESSURE TO ENERGY DENSITY
Chevallier-PoLarski-linder Parametrization
W(a) = Wo + Wa(1 – a)
w for a Scalar Field model
Equation of motion
slow roll formula for delta w 1) First term is small compared to second. 2) velocity is small so roughly constant and Hence also .
Our potential
N-flation promoters: Dimopoulos et al. 2005, easther and mcallister 2006, kim and liddle 2006 n-field quintessence: kaloper and sorbo 2005, svrcek 2006
cpl parametrization vs. our model
slow-roll formula vs. numerical results
References Dark Energy as Double N-Flation--Observational Predictions, Gott and slepian, 2011, http://arxiv.org/abs/1011.2528 and references therein
Slow Roll Formula
Slow Roll Formula

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