19 research outputs found

    The Beginning of the End of the Anthropic Principle

    Get PDF
    We argue that if string theory as an approach to the fundamental laws of physics is correct, then there is almost no room for anthropic arguments in cosmology. The quark and lepton masses and interaction strengths are determined.Comment: 12 page

    Accelerating universe emergent from the landscape

    Get PDF
    We propose that the existence of the string landscape suggests the universe can be in a quantum glass state, where an extremely large viscosity is generated, and long distance dynamics slows down. At the same time, the short distance dynamics is not altered due to the separation of time scales. This scenario can help to understand some controversies in cosmology, for example the natural existence of slow roll inflation and dark energy in the landscape, the apparent smallness of the cosmological constant. We see also that moduli stabilization is no longer necessary. We further identify the glass transition point, where the viscosity diverges, as the location of the cosmic horizon. We try to reconstruct the geometry of the accelerating universe from the structure of the landscape, and find that the metric should have an infinite jump when crossing the horizon. We predict that the static coordinate metric for dS space breaks down outside the horizon.Comment: 20 pages, no figures, harvma

    Can we predict Λ\Lambda for the Non-SUSY sector of the Landscape ?

    Get PDF
    We propose a new selection criteria for predicting the most probable wavefunction of the universe that propagates on the string landscape background, by studying its dynamics from a quantum cosmology view. Previously we applied this proposal to the SUSYSUSY sector of the landscape. In this work the dynamic selection criterion is applied to the investigation of the non-SUSYSUSY sector.In the absence of detailed information about its structure, it is assumed that this sector has a stochastic distribution of vacua energies.The calculation of a distribution probability for the cosmological constants Λeff\Lambda_{eff}, obtained from the density of states ρ\rho, indicates that the most probable wavefunction is peaked around universes with zero Λeff\Lambda_{eff}. In contrast to the {\it extended wavefunction} solutions found for the SUSYSUSY sector with NN-vacua and peaked around Λeff1N2\Lambda_{eff}\simeq \frac{1}{N^2}, wavefunctions residing on the non-SUSYSUSY sector exhibit {\it Anderson localization}.Although minisuperspace is a limited approach it presently provides a dynamical quantum selection rule for the most probable vacua solution from the landscape.Comment: 6 pages, 1 figur
    corecore