184 citations
- The University of TokyoJP15 papers
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15 papers · 1 filter
Gauge-invariant construction of quantum cosmology
Fumitoshi Amemiya, Tatsuhiko Koike
We present and analyze a gauge-invariant quantum theory of the Friedmann-Robertson-Walker universe with dust. We construct the reduced phase space spanned by gauge-invariant quanti…
Enhanced spin Hall effect by tuning antidot potential: Proposal for a spin filter
Tomohiro Yokoyama, Mikio Eto
We propose an efficient spin filter including an antidot fabricated on semiconductor heterostructures with strong spin-orbit interaction. The antidot creates a tunable potential on…
Dynamical Compactification and Inflation in Einstein-Yang-Mills Theory with Higher Derivative Coupling
Hironobu Kihara, Muneto Nitta, Misao Sasaki +2
We study cosmology of the Einstein-Yang-Mills theory in ten dimensions with a quartic term in the Yang-Mills field strength. We obtain analytically a class of cosmological solution…
Multiplicity of Nova Envelope Solutions and Occurrence of Optically Thick Winds
Mariko Kato, Izumi Hachisu
We revisit the occurrence condition of optically thick winds reported by Kato (1985) and Kato and Hachisu (1989) who examined mathematically nova envelope solutions with an old opa…
Fractional Vortices and Lumps
Minoru Eto, Toshiaki Fujimori, Sven Bjarke Gudnason +5
We study what might be called fractional vortices, vortex configurations with the minimum winding from the viewpoint of their topological stability, but which are characterized by…
Formation of Nuclear "Pasta" in Supernovae
Gentaro Watanabe, Hidetaka Sonoda, Toshiki Maruyama +3
In supernova cores, nuclear "pasta" phases such as triangular lattice of rod-like nuclei and layered structure of slab-like nuclei are considered to exist. However, it is still unc…