On Asymptotic Quantum Statistical Inference
  We study asymptotically optimal statistical inference concerning the unknown state of $N$ identical quantum systems, using two complementary approaches: a "poor man's approach" based on the van Trees inequality, and a rather more sophisticated approach using the recently developed quantum form of LeCam's theory of Local Asymptotic Normality. 
Richard D. Gill and Madalin Guta
quant-ph math.ST stat.TH