10 citations · 57 across the 20 of their papers we have counts for
20 papers
A state description of pair production from Dirac sea in gravitational field --physical interpretation of Weyl anomaly--
Yoshinobu Habara, Holger B. Nielsen, Masao Ninomiya
We present the method that the pair production of particles is described as a Fock space state vector, where the pair production stems from receiving energy from, as an example, gr…
A new mechanism of realizing inflationary universe with recourse to backreaction of quantized free fields -- Inflation without inflaton --
Yoshinobu Habara, Hikaru Kawai, Masao Ninomiya
It is shown that the inflationary era in early universe is realized due to the effect of backreaction of quantized matter fields. In fact we start by quantizing a free scalar field…
Physical Account of Weyl Anomaly from Dirac Sea
Y. Habara, H. B. Nielsen, M. Ninomiya
We derive the Weyl anomaly in two dimensional space-time by considering the Dirac sea regularized some negatively counted formally bosonic extra species.In fact we calculate the tr…
Possible origin of CMB temperature fluctuations: Vacuum fluctuations of Kaluza-Klein and string states during inflationary era
Yoshinobu Habara, Hikaru Kawai, Masao Ninomiya +1
We point out that the temperature fluctuations of cosmic microwave background (CMB) can be generated in a way that is different from the one usually assumed in slow-roll inflation.…
CMB Fluctuations and String Compactification Scales
Yoshinobu Habara, Hikaru Kawai, Masao Ninomiya +1
We propose a mechanism for the generation of temperature fluctuations of cosmic microwave background. We consider a large number of fields, such as Kaluza-Klein modes and string ex…
Gauge Theory and Dirac Operator on Noncommutative Space II -Minkowskian and Euclidean Cases-
Yoshinobu Habara
In the preceding paper [arXiv:hep-th/0604217], we construct the Dirac operator and the integral on the canonical noncommutative space. As a matter of fact, they are ones on the non…