1212.5935 (Robert de Mello Koch et al.)

Restricted Schur Polynomials for Fermions and integrability in the
su(2|3) sector    [PDF]

Robert de Mello Koch, Pablo Diaz, Nkululeko Nokwara

We define restricted Schur polynomials built using both fermionic and bosonic fields which transform in the adjoint of the gauge group U(N). We show that these operators diagonalize the free field two point function to all orders in 1/N. As an application of our new operators, we study the action of the one loop dilatation operator in the su(2|3) sector in a large N but non-planar limit. The restricted Schur polynomials we study are dual to giant gravitons. We find that the one loop dilatation operator can be diagonalized using a double coset ansatz. The resulting spectrum of anomalous dimensions matches the spectrum of a set of decoupled oscillators. Finally, in an Appendix we study the action of the one loop dilatation operator in an sl(2) sector. This action is again diagonalized by a double coset ansatz.

View original: http://arxiv.org/abs/1212.5935