Quantum tomography via Non-orthogonal basis and weak values
  Using a relation between a bi-orthogonal set of equiseparable bases and the weak values of the density matrix we derive an explicit formula for its tomographic reconstruction completely analogous to the standard mutually unbiased bases expansion. With the simple example of a qubit is evidenced the relationship between weak values, measured probabilities and the separation between non-orthogonal bases. 
Juan Jesus Diaz, Isabel Sainz, Andrei B. Klimov
quant-ph