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A sufficient condition for de Sitter vacua in type IIB string theory
moduli stabilization string vacua ux compactications
2011/10/18
We derive a sufficient condition for realizing meta-stable de Sitter vacua with small positive cosmological constant within type IIB string theory flux compactifications with spontaneously broken supe...
Effects of Initial Condition and Cloud Density on the Composition of the Grain Mantle
Molecular clouds ISM abundances molecules chemical evo-lution Monte-Carlo simulations
2010/11/15
Evolution of grain mantles in various interstellar environment is studied. We concentrate mainly on water, methanol, carbon di-oxide, which constitute nearly 90% of the grain mantle. We investigate ho...