Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-07-24
Nucl.Phys. B512 (1998) 431-444
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, Latex. Minor improvements in the last paragraph of the conclusions. Numbering of references has changed
Scientific paper
10.1016/S0550-3213(97)00689-5
There are two different spectral flows on the N=2 superconformal algebras (four in the case of the Topological algebra). The usual spectral flow, first considered by Schwimmer and Seiberg, is an even transformation, whereas the spectral flow previously considered by the author and Rosado is an odd transformation. We show that the even spectral flow is generated by the odd spectral flow, and therefore only the latter is fundamental. We also analyze thoroughly the four ``topological'' spectral flows, writing two of them here for the first time. Whereas the even and the odd spectral flows have quasi-mirrored properties acting on the Antiperiodic or the Periodic algebras, the topological even and odd spectral flows have drastically different properties acting on the Topological algebra. The other two topological spectral flows have mixed even and odd properties. We show that the even and the even-odd topological spectral flows are generated by the odd and the odd-even topological spectral flows, and therefore only the latter are fundamental.
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