Magnetization formula in the bounded XYZ spin chain

The bounded XYZ spin chain is studied. We construct the vacuum states by the vertex operators of the level one modules of the elliptic algebra, and compact them through a geometric symmetry of the model called the turning symmetry. From these simplified expressions, the “magnetization formula” for magnetizations at a boundary in the bounded chain and in the half-infinite chains is derived. Applying this formula we calculate the spontaneous magnetization at a boundary in the bounded XYZ spin chain.