The derivation of the equations satisfied by the density operator of a quantum integrable spin chain will be discussed. We use the quantum group approach and derive the equations for the case of an arbitrary quantum loop algebra.
Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/5312