A new approach for the strong unique continuation of electromagnetic   Schroedinger operator with complex-valued coefficient
  This paper mainly addresses the strong unique continuation property for the electromagnetic Schr\"{o}dinger operator with complex-valued coefficients. Appropriate multipliers with physical backgrounds have been introduced to prove a priori estimates. Moreover, its application in an exact controllability problem has been shown, in which case, the boundary value determines the interior value completely. 
Xiaojun Lu and Xiaofen Lv
math-ph math.MP math.OC