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- W3099127645 abstract "We study in detail the ADHM construction of U(N) instantons on noncommutative Euclidean space-time R_{NC}^4 and noncommutative space R_{NC}^2 x R^2. We point out that the completeness condition in the ADHM construction could be invalidated in certain circumstances. When this happens, regular instanton configuration may not exist even if the ADHM constraints are satisfied. Some of the existing solutions in the literature indeed violate the completeness condition and hence are not correct. We present alternative solutions for these cases. In particular, we show for the first time how to construct explicitly regular U(N) instanton solutions on R_{NC}^4 and on R_{NC}^2 x R^2. We also give a simple general argument based on the Corrigan's identity that the topological charge of noncommutative regular instantons is always an integer." @default.
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- W3099127645 date "2002-01-01" @default.
- W3099127645 modified "2023-10-16" @default.
- W3099127645 title "Notes on noncommutative instantons" @default.
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- W3099127645 doi "https://doi.org/10.1016/s0550-3213(01)00576-4" @default.
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