Experimental systems contain several millions lattice sites, with average filling above unity.
Surprisingly, despite of the constant acceleration the particle does not translate, but just moves over very few lattice sites.
In this system, disorder comes from extra atoms sitting in the optical lattice sites.
The pairing of the electrons occur at near-neighbor lattice sites as a result.
S indicates the lattice site that the species occupies.
For a given detector, the crystal volume is divided into a cubic matrix of lattice sites.
Solid carbon dioxide has a similar structure with the C02 molecules occupying the lattice sites.
Lets consider a 2 dimensional spin network, with L spins (lattice sites) on each side.
They are all chemically identical, and in equivalent lattice sites, so there is no reason why charge should be transferred between them.
Any atoms off their lattice sites will give visible extra scattering.