Lecture Notes in Physics
DOI: 10.1007/978-3-540-71013-4_12
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The Issue of Dark Energy in String Theory

Abstract: Recent astrophysical observations, pertaining to either high-redshift supernovae or cosmic microwave background temperature fluctuations, as those measured recently by the WMAP satellite, provide us with data of unprecedented accuracy, pointing towards two (related) facts: (i) our Universe is accelerated at present, and (ii) more than 70 % of its energy content consists of an unknown substance, termed dark energy, which is believed responsible for its current acceleration. Both of these facts are a challenge t… Show more

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Cited by 4 publications
(8 citation statements)
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“…12, 13 nor on the Scale Relativity Theory; (10) nor on the schemes based on a two-measure theory; 14 the holographic renormalization group program, quintessence, noncritical strings (15) etc.... nor with an ad hoc introduction of the Hubble distance (Ref. 41).…”
Section: Generalized De Sitter and Anti De Sitter Metricsmentioning
confidence: 99%
“…12, 13 nor on the Scale Relativity Theory; (10) nor on the schemes based on a two-measure theory; 14 the holographic renormalization group program, quintessence, noncritical strings (15) etc.... nor with an ad hoc introduction of the Hubble distance (Ref. 41).…”
Section: Generalized De Sitter and Anti De Sitter Metricsmentioning
confidence: 99%
“…На самом деле члены −m 2 ϕa 2 , X(ϕ, f 2 ) в выражении (4) инвариантны и имеют один и тот же вид в произвольной размерности. Поэтому можно просто добавить выражение (11), (14) к лагранжианам теории гравитации и в случае цилиндрической симметрии. Заметим, однако, что существует и другая редукция вектонного потенциала a i .…”
Section: размерные редукции обобщенной теории гравитацииunclassified
“…Оставшиеся уравнения имеют тот же вид, что и в обычной дилатонной гравитации, взаимодействующей со скалярными полями 11) :…”
Section: а т филипповunclassified
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“…Moreover, the phenomenon of dark energy was not predicted by string theory and its origin in the stringy framework proved to be rather difficult to uncover and understand. The problem of dark energy in string theory looks very deep and is related to many other complex issues of (non-existing) quantum cosmology but it also led to some beautiful and exciting speculations, like eternal inflation and multiverse (see, e.g., [11] and [12]). On the other hand, if we modestly try first to find a natural place for DE in classical cosmological models, which inevitably are essentially nonlinear and non-integrable, we better return to recalling the origin of general relativity and look for some options abandoned or not found by its creators.…”
Section: Introductionmentioning
confidence: 99%