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Thermodynamics via Creation from Nothing: Limiting the Cosmological Constant Landscape | | A.O.Barvinsky
; A.Yu.Kamenshchik
; | | Date: |
19 Nov 2006 | | Abstract: | The creation of a quantum Universe is described by a {em density matrix} which yields an ensemble of universes with the cosmological constant limited to a bounded range $Lambda_{
m min}leq Lambda leq Lambda_{
m max}$. The domain $Lambda<Lambda_{
m min}$ is ruled out by a cosmological bootstrap requirement (the self-consistent back reaction of hot matter). The upper cutoff results from the quantum effects of vacuum energy and the conformal anomaly mediated by a special ghost-avoidance renormalization. The cutoff $Lambda_{
m max}$ establishes a new quantum scale -- the accumulation point of an infinite sequence of garland-type instantons. The dependence of the cosmological constant range on particle phenomenology suggests a possible dynamical selection mechanism for the landscape of string vacua. | | Source: | arXiv, hep-th/0611206 | | Services: | Forum | Review | PDF | Favorites | |
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