Abstract We calculate high-precision constraints on Natural Inflation relative to current observational from Planck 2018 + BICEP/Keck(BK15) Polarization BAO r and n S , including post-inflationary history of the universe. find that, for conventional dynamics, with a cosine potential is disfavored at greater than 95% confidence out by data. If we assume protracted reheating characterized w ?>...

In the standard approach to defining a Planck scale where gravity is brought into the quantum domain, the Schwarzschild gravitational radius is set equal to the Compton wavelength. However, ignored thereby are the charge and spin, the fundamental quantized aspects of matter. The gravitational and null-surface radii of the Kerr-Newman metric are used to introduce spin and charge into a new exten...

— In the near future the Planck satellite [1] will gather impressive information about the anisotropies of the cosmic microwave background and about the galaxy clusters which perturb that signal. We will here review the ability of Planck to extract information about these galaxy clusters through the Sunyaev-Zeldovich imprint. We will conclude that Planck will provide a catalogue of galaxy clust...

Dienstag, 6. Mai 2014 17.15 Uhr Stuttgarter Physikalisches Kolloquium Max-Planck-Institut für Festkörperforschung Max-Planck-Institut für Intelligente Systeme Fachbereich Physik, Universität Stuttgart

A finitistic quantum field theory, as a model for a unified theory of elementary particles is proposed, making the assumption that all spatial and temporal distances can only assume integer values of a fundamental length and time, for which we have chosen the Planck length and Planck time. To satisfy the condition of causality in its quantized version, the theory must be exactly nonrelativistic...

If the universe is ( or a slice of ) AdS5 space with 3-branes, the 5-dimensional GUT scale in each brane can be indetified as the 5-dimensional Planck scale, but, the 4-dimensional Planck scale is generated from the low 4-dimensional GUT scale exponentially in our world. The 4-dimensional GUT scales and Planck scale are related to the 5-dimensional GUT scales and Planck scale by exponential fac...

In this paper the quantum heat transport equation (QHT) is applied to the study of thermal properties of Planck gas, i.e. gas of the massive particles with mass equal Planck mass, Mp = (h̄c/G)1/2 and relaxation time equals Planck time, τp = (h̄G/c5)1/2. The quantum of thermal energy for Planck gas, EPlanck = 1019 GeV and quantum thermal diffusion coefficient DPlanck = (h̄G/c)1/2 are calculated. Wi...

Planck scale physics represents a future challenge, located between particle physics and general relativity. The Planck scale marks a threshold beyond which the old description of spacetime breaks down and conceptually new phenomena must appear. Little is known about the fundamental theory valid at Planckian energies, except that it necessarily seems to imply the occurrence of a minimal length ...

Dienstag, 19. Mai 2015 17.15 Uhr Stuttgarter Physikalisches Kolloquium Max-Planck-Institut für Festkörperforschung Max-Planck-Institut für Intelligente Systeme Fachbereich Physik, Universität Stuttgart