Anti-self-dual Yang-Mills equations on noncommutative spacetime

Abstract

By replacing the ordinary product with the so called $\star$-product, one can construct an analogue of the anti-self-dual Yang-Mills (ASDYM) equations on the noncommutative ${\mathbb{R}}^4$. Many properties of the ordinary ASDYM equations turn out to be inherited by the $\star$-product ASDYM equation. In particular, the twistorial interpretation of the ordinary ASDYM equations can be extended to the noncommutative ${\mathbb{R}}^4$, from which one can also derive the fundamental strutures for integrability such as a zero-curvature representation, an associated linear system, the Riemann-Hilbert problem, etc. These properties are further preserved under dimensional reduction to the principal chiral field model and Hitchin's Higgs pair equations. However, some structures relying on finite dimensional linear algebra break down in the $\star$-product analogues.

latex2e using packages amsmath and amssymb, 24 pages, no figure; (v2) a comment and references on the Nahm equations are added; (v3) minor errors are corrected, and two references are added; (v4) final version for publication

References in corpus (2)

• Noncommutative Instantons and Twistor Transform
• Noncommutative Riemann Surfaces

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