Bypassing state initialization in Hamiltonian tomography on spin-chains
  We provide an extensive discussion on a scheme for Hamiltonian tomography of a spin-chain model that does not require state initialization [Phys. Rev. Lett. 102, 187203 (2009)]. The method has spurred the attention of the physics community interested in indirect acquisition of information on the dynamics of quantum many-body systems and represents a genuine instance of a control-limited quantum protocol. 
C. Di Franco, M. Paternostro, M. S. Kim
quant-ph