New orientifold weak coupling limits in F-theory

An Orientifold from F Theory

The massless spectrum of an orientifold of the IIB string theory is computed and shown to be identical to F theory on the Calabi-Yau threefold with h11 = 51 and h21 = 3. Target space duality is also considered in this model.

F-theory and the Gimon-Polchinski Orientifold

We establish the equivalence of the Gimon-Polchinski orientifold and F-theory on an elliptically fibered Calabi-Yau three fold on base CP 1 × CP 1 by comparing the gauge symmetry breaking pattern, local deformations in the moduli space, as well as the axiondilaton background in the weak coupling limit in the two theories. We also provide an explanation for an apparent discrepancy between the F-...

Weak Coupling Theory

E (2000) Detection and sorting of neural spikes using wavelet packets. Phys Rev Lett 85:4637–4640 Laubach M (2004) Wavelet-based processing of neuronal spike trains prior to discriminant analysis. J Neurosci Methods 134:159–168 Letelier JC, Weber PP (2000) Spike sorting based on discrete wavelet transform coefficients. J Neurosci Methods 101:93–106 Liang H, Bressler SL, Desimone R, Fries P (200...

New Consistent Limits of M-theory and Coupling Constant Quantization

The construction of phenomenologically-viable effective field theories describing M-theory compactified on S1/Z2 is revisited, and new insights into the parameters of the theory are explained. Particularly, the web of constraints which follow from supersymmetry and anomaly cancelation is shown to be more complex than previously understood. One especially interesting result is that, in contradis...

Weak coupling limits in a stochastic model of heat conduction