Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-02-09
JHEP 0702:010,2007
Physics
High Energy Physics
High Energy Physics - Theory
Latex file, 21 pages
Scientific paper
10.1088/1126-6708/2007/02/010
Interpreting the coordinates of the quantum Euclidean space R_q^4 [the SO_q(4)-covariant noncommutative space] as the entries of a ``q-quaternion matrix'' we construct (anti)instanton solutions of a would-be q-deformed su(2) Yang-Mills theory on R_q^4. Since the (anti)selfduality equations are covariant under the quantum group of deformed rotations, translations and scale change, by applying the latter we can respectively generate ``gauge equivalent'' or ``inequivalent'' solutions from the one centered at the origin and with unit size. We also construct multi-instanton solutions. As these solutions depend on noncommuting parameters playing the roles of `sizes' and `coordinates of the centers' of the instantons, this indicates that the moduli space of a complete theory should be a noncommutative manifold. Similarly, as the (global) gauge transformations relating ``gauge equivalent'' solutions depend on the generators of two copies of SU_q(2), this suggests that gauge transformations should be allowed to depend on additional noncommutative parameters.
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