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Heterotic String in a Constant Magnetic Field
Akira Kokado, Gaku Konisi, Takesi Saito
When a charged heterotic string is placed in a constant magnetic field B, we show that this system can be solved exactly by using the cyclotron frequency. We then calculate anomali…
Spectrum-Generating Algebra for Charged Superstrings in Background Gauge Fields
Akira Kokado, Gaku Konisi, Takesi Saito
The spectrum-generating algebra (SGA) for charged superstrings placed in constant background magnetic fields is constructed. Contrary to the neutral string this algebra is characte…
Charged Strings and Spectrum-Generating Algebra
Akira Kokado, Gaku Konisi, Takesi Saito
We consider a system that both ends of a charged open string are attached on the D-brane with constant electromagnetic fields. Contrary to neutral strings, the quantization of c…
Spectrum-Generating Algebra for Charged Strings
Akira Kokado, Gaku Konisi, Takesi Saito
When an open string ends with charges on a D2-brane, which involves constant background magnetic field perpendicular to the brane, we construct the spectrum-generating algebra for…
Hall Conductivity for Charged Strings and Modified Spectrum-Generating Algebra
Akira Kokado, Gaku Konisi, Takesi Saito
When open strings end with a charge q on a D2-brane, which involves constant background magnetic field B perpendicular to the brane, we calculate the Hall conductivity for these ch…
Scalar-Tensor Theory of Gravity on Geometry
Akira Kokado, Gaku Konisi, Takesi Saito +1
In the Brans-Dicke(BD) theory on geometry the geometrical meaning of the torsion is clarified. The BD theory on is rederived by taking into…