Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Watabiki, Yoshiyuki"'
Autor:
Ambjorn, Jan, Watabiki, Yoshiyuki
We show that by allowing our Universe to merge with other universes one is lead to modified Friedmann equations that explain the present accelerated expansion of our Universe without the need of a cosmological constant.
Externí odkaz:
http://arxiv.org/abs/2308.10924
Autor:
Watabiki, Yoshiyuki
It is shown how one, guided by causality, starting from so-called dynamical triangulations, is led to a candidate of quantum gravity that describes our Universe. This theory is based on W- and Jordan algebras. It explains how our Universe was created
Externí odkaz:
http://arxiv.org/abs/2212.13109
Autor:
Ambjorn, Jan, Watabiki, Yoshiyuki
We have already shown how a modified Friedmann equation, originating from a model of the Universe built from a certain $W_3$ algebra, is able to explainthe difference between the Hubble constants extracted from CMB data and from local measurements. I
Externí odkaz:
http://arxiv.org/abs/2208.02607
We show that in a two-dimensional model of quantum gravity the summation over all possible wormhole configurations leads to a kind of Coleman mechanism where the cosmological constant plays no role for large universes. Observers who are unable to obs
Externí odkaz:
http://arxiv.org/abs/2101.00478
Autor:
Ambjorn, Jan, Watabiki, Yoshiyuki
We propose a model for the universe based on Jordan algebras. The action consists of cubic terms with coefficients being the structure constants of a Jordan algebra. Coupling constants only enter the theory via symmetry breaking which also selects a
Externí odkaz:
http://arxiv.org/abs/2003.13527
Causal Dynamical Triangulations (CDT) is a lattice theory where aspects of quantum gravity can be studied. Two-dimensional CDT can be solved analytically and the continuum (quantum) Hamiltonian obtained. In this article we show that this continuum Ha
Externí odkaz:
http://arxiv.org/abs/1302.6359
We study the Causal Dynamical Triangulation (CDT) with extended interactions in 1+1 dimensions applying the method in the non-critical string field theory (SFT) constructed by Ishibashi and Kawai. For this model, we solve Schwinger-Dyson's equation (
Externí odkaz:
http://arxiv.org/abs/1108.0552
Autor:
Tsukioka, Takuya, Watabiki, Yoshiyuki
Publikováno v:
Int.J.Mod.Phys. A20 (2005) 5807-5870
We construct a Neveu-Schwarz-Ramond superstring model which is invariant under supersymmetric U(1)_V * U(1)_A gauge transformations as well as the super-general coordinate, the super local Lorentz and the super-Weyl transformations on the string worl
Externí odkaz:
http://arxiv.org/abs/hep-th/0412264
Autor:
Tsukioka, Takuya, Watabiki, Yoshiyuki
Publikováno v:
Int.J.Mod.Phys. A19 (2004) 1923-1960
We investigate the quantization of the bosonic string model which has a local U(1)_V * U(1)_A gauge invariance as well as the general coordinate and Weyl invariance on the world-sheet. The model is quantized by Lagrangian and Hamiltonian BRST formula
Externí odkaz:
http://arxiv.org/abs/hep-th/0308206
Autor:
Watabiki, Yoshiyuki
Publikováno v:
JHEP 0305 (2003) 001
We have covariantized the Lagrangians of the U(1)_V * U(1)_A models, which have U(1)_V * U(1)_A gauge symmetry in two dimensions, and studied their symmetric structures. The special property of the U(1)_V * U(1)_A models is the fact that all these mo
Externí odkaz:
http://arxiv.org/abs/hep-th/0303045