Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2012-01-30
Physics
High Energy Physics
High Energy Physics - Theory
1+8 pages, 14 figures; talk presented at SQS-11 during 18-23 July, 2011, at JINR, Dubna, Russia; v2: missing * in eq.(1) added
Scientific paper
The existence of K-instantons on a cylinder M^7 = R_tau x K/H over a homogeneous nearly K"ahler 6-manifold K/H requires a conformally parallel or a cocalibrated G_2-structure on M^7. The generalized anti-self-duality on M^7 implies a Chern-Simons flow on K/H which runs between instantons on the coset. For K-equivariant connections, the torsionful Yang-Mills equation reduces to a particular quartic dynamics for a Newtonian particle on C. When the torsion corresponds to one of the G_2-structures, this dynamics follows from a gradient or hamiltonian flow equation, respectively. We present the analytic (kink-type) solutions and plot numerical non-BPS solutions for general torsion values interpolating between the instantonic ones.
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