The holographic space-time model of inflation and its predictions for the CMB primordial spectra
Sidan A, Tom Banks
arXiv:2502.15108v1 Announce Type: cross
Abstract: In 1998 Carlip and Solodukhin independently conjectured the equality between fluctuations in the modular Hamiltonian of black holes and its expectation value. Banks and Zurek’s 2021 work generalized this observation to any causal diamonds. We use this observation to calculate the precise normalization of primordial scalar and tensor power spectra in the Holographic Space-time (HST) model of inflation. In previous work Banks and Fischler outlined the general calculation of inflationary power spectra in this model, which we review here. Its conceptual basis is radically different from field theoretic inflation and it has no Transplanckian problems, but its predictions for power spectra will be shown to fit extant data equally well, and the tensor-to-scalar ratio agrees with experimental observations. A brief presentation can be found on the Strings 2025 YouTube channel https://www.youtube.com/watch?v=MDi0gzwh1zY&feature=youtu.bearXiv:2502.15108v1 Announce Type: cross
Abstract: In 1998 Carlip and Solodukhin independently conjectured the equality between fluctuations in the modular Hamiltonian of black holes and its expectation value. Banks and Zurek’s 2021 work generalized this observation to any causal diamonds. We use this observation to calculate the precise normalization of primordial scalar and tensor power spectra in the Holographic Space-time (HST) model of inflation. In previous work Banks and Fischler outlined the general calculation of inflationary power spectra in this model, which we review here. Its conceptual basis is radically different from field theoretic inflation and it has no Transplanckian problems, but its predictions for power spectra will be shown to fit extant data equally well, and the tensor-to-scalar ratio agrees with experimental observations. A brief presentation can be found on the Strings 2025 YouTube channel https://www.youtube.com/watch?v=MDi0gzwh1zY&feature=youtu.be