Department of Physics, Stanford University, Stanford, CA 94305-4060, USA
Stanford University
pub.1019209531
dimensions_id
Kaloper
Nemanja
doi
10.1088/1126-6708/2001/06/003
Pure Mathematics
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.
2019-04-10T17:47
non_research_article
2001-05-31
true
003
2001-05-31
String theory and quintessence
https://scigraph.springernature.com/explorer/license/
articles
http://iopscience.iop.org/article/10.1088/1126-6708/2001/06/003/meta
en
Institute for Theoretical Physics, University of California Santa Barbara, Santa Barbara, CA 93106, USA
University of California, Santa Barbara
Department of Physics, Stanford University, Stanford, CA 94305-4060, USA
5b86f7b569eb059469b714dc419396cc967c7f6afd1b1b816359acc10fa67b95
readcube_id
Simeon
Hellerman
Springer Nature - SN SciGraph project
1029-8479
1126-6708
Journal of High Energy Physics
2001
Mathematical Sciences
Susskind
Leonard
06