String theory and quintessence

By S. Hellerman, N. Kaloper, L. Susskind. 2001

244 citations recorded by the source corpus.

We discuss the obstacles for defining a set of observable quantities analogous to an S-matrix which are needed to formulate string theory in an accelerating universe. We show that the quintessence models with the equations of state −1 < w < −1/3 have future horizons and may be no better suited to an S-matrix or S-vector description. We also show that in a class of theories with a stable supersymmetric vacuum, a system cannot relax into a zero-energy supersymmetric vacuum while accelerating if the evolution is dominated by a single scalar field with a stable potential. Thus describing an eternally accelerating universe may be a challenge for string theory as presently defined.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/a6c5dc6287add1d4d65865df9ad1e1690ca9fcc0

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Andrei Linde
2. E. Silverstein
3. V. Hubeny
4. R. Myers
5. M. Rangamani
6. D. Harlow
7. R. Kallosh
8. S. Kachru

In Nuclear and High Energy Physics

1. Andrei Linde
2. V. Hubeny
3. E. Silverstein
4. D. Harlow
5. R. Myers
6. M. Rangamani
7. J. Maldacena
8. T. Takayanagi

Citations in the corpus

• Cosmology and the S matrix (2004, background): “by thermal erosion (Sec. 4.1) and by collisions with black holes (Sec. 4.2). 5.2 Q-space Like de Sitter space, quintessence dominated universes (−1 &lt; w &lt; −1/3) have a cosmological event horizon [13,14](see Sec. 2). Hence, theglobalstatein the asymptotic future cannot be measured, and there is ”
• The Acceleration of the universe, a challenge for string theory (2001, background): “Susskind informed us of their work [19], in which they reach similar conclusions.”
• The dS/CFT Correspondence and the Big Smash (2001, background): “…the CFTs in dS/CFT are of a radically unconventional form, and this opens up the possibility that Smash-free Phantom spacetimes offer a simple model of a “bouncing” cosmology in which the quantum-mechanical entanglement of the field theories in the infinite past and future plays an essential role.”
• The Holographic principle (2002, background): “Implications of the holographic principle in other accelerating universes have been considered by Hellerman, Kaloper, and Susskind (2001) and Fischler et al. (2001); see also Banks and Dine (2001), Carneiro da Cunha (2002).”
• Signatures of short distance physics in the cosmic microwave background (2002, background): “the region when the apparent horizon is almost null [ 21 ], with the cosmological Hawking”
• Inflation in AdS/CFT (2005, background): “These constructions do not answer many of the deep questions raised by inflation: How can inflation begin? What measure should be used on the multiverse of eternal inflation? What is the holographic description of inflation? More generally, what degrees of freedom are appropriate for a complete desc”
• A)dS Backgrounds from Asymmetric Orientifolds (2001, background): “On the other hand, if this were to persist indefinitely, then the dark energy would dominate in the future, and one would have a situation with cosmological event horizons with the concommitant difficulties involved in formulating observables (in particular the lack of an S-matrix) [9][19][20][21].”