Yangian symmetry of the Y=0 maximal giant graviton

TL;DR

This paper investigates the Yangian symmetry structure of open strings ending on the Y=0 maximal giant graviton in AdS_5 x S^5, revealing a generalized twisted boundary Yangian related to symmetric pairs and subalgebra preservation.

Contribution

It introduces a generalized twisted boundary Yangian for open strings on the Y=0 maximal giant graviton, extending understanding of boundary symmetries in AdS/CFT.

Findings

Identifies the boundary Yangian structure preserving a subalgebra h of g.

Describes the realization of the boundary Yangian for open strings on the Y=0 maximal giant graviton.

Analyzes the case where the boundary preserves only an su(1|2) subalgebra.

Abstract

We study the remnants of Yangian symmetry of AdS/CFT magnons reflecting from boundaries with no degrees of freedom. We present the generalized twisted boundary Yangian of open strings ending on boundaries which preserve only a subalgebra h of the bulk algebra g, where (g,h) is a symmetric pair. This is realized by open strings ending on the D3 brane known as the Y=0 maximal giant graviton in AdS_5 x S^5. We also consider the Yangian symmetry of the boundary which preserves an su(1|2) subalgebra only.