Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-28
JHEP 0110:012,2001
Physics
High Energy Physics
High Energy Physics - Theory
Latex, 21 pages. JHEP format
Scientific paper
10.1088/1126-6708/2001/10/012
The apparent observation of dark energy poses problems for string theory. In de Sitter space, or in quintessence models, one cannot define a gauge-invariant S-matrix. We argue that eternal quintessence does not arise in weakly coupled string theory, but point out that it is difficult to define an $S$-matrix even in the presence of perturbative potentials for the moduli. The solutions of the Fischler-Susskind equations all have Big Bang or Big Crunch Singularities. We believe that an S-matrix (or S-vector) exists in this context but cannot be calculated by purely perturbative methods. We study the possibility of metastable de Sitter vacua in such weakly coupled scenarios, and conclude that the S-matrix of the extreme weak coupling region cannot probe de Sitter physics. We also consider proposed explanations of the dark energy from the perspective of string theory, and find that most are implausible. We note that it is possible that the axion constitutes both the dark matter and the dark energy.
Banks Tom
Dine Michael
No associations
LandOfFree
Dark Energy in Perturbative String Cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dark Energy in Perturbative String Cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dark Energy in Perturbative String Cosmology will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-331594