6 papers · 1 filter
Quantum Gravity Scenario of Inflation based on the CMB Anisotropies
Ken-ji Hamada, Tetsuyuki Yukawa
Inflationary scenario based on a renormalizable model of conformal gravity is proposed and primordial spectrum is derived. The sharp fall off of the angular power spectra at low mu…
Note on Quantum Diffeomorphism Invariance, Physical States and Unitarity
Ken-ji Hamada
Recently, using a local action satisfying the Wess-Zumino condition as a kinetic term of the conformal mode, we formulated a four-dimensional quantum geometry (4DQG). The conformal…
On The BRST Formulation of Diffeomorphism Invariant 4D Quantum Gravity
Ken-ji Hamada
In this note we give some remarks on the BRST formulation of a renormalizable and diffemorphism invariant 4D quantum gravity recently proposed by the author, which satisfies the in…
W_infty Structures of 2D String Theory
Ken-ji Hamada
The Ward identities of the symmetry in 2D string theory in the tachyon background are studied in the continuum approach. Comparing the solutions with the matrix model…
Quantum Gravity and Black Hole
Ken-ji Hamada, Asato Tsuchiya
The quantum theory of the spherically symmetric gravity in 3+1 dimensions is investigated. The functional measures are explicitly evaluated and the physical state conditions are de…
Gravitational Collapse in 1+1 Dimensions and Quantum Gravity
K. Hamada
We investigate the quantum theory of 1+1 dimensional dilaton gravity, which is an interesting toy model of the black hole dynamics. The functional measures of gravity part are expl…