On Witten's global anomaly for higher SU(2) representations

Details On Witten's global anomaly for higher SU(2) representations On Witten's global anomaly for higher SU(2) representations

2002-09-09

arxiv.org/abs/hep-lat/0209098v1

Nucl.Phys. B650 (2003) 522-542

Physics

High Energy Physics

High Energy Physics - Lattice

24 pages, 12 eps figures

Scientific paper

10.1016/S0550-3213(02)01027-1

The spectral flow of the overlap operator is computed numerically along a particular path in gauge field space. The path connects two gauge equivalent configurations which differ by a gauge transformation in the non-trivial class of pi_4(SU(2)). The computation is done with the SU(2) gauge field in the fundamental, the 3/2, and the 5/2 representation. The number of eigenvalue pairs that change places along this path is established for these three representations and an even-odd pattern predicted by Witten is verified.

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