GQ corrections in the circuit theory of quantum transport

We develop a finite-element technique that allows one to evaluate correction of the order of GQ to various transport characteristics of arbitrary nanostructures. Common examples of such corrections are the weak-localization effect on conductance and universal conductance fluctuations. Our approach, however, is not restricted to conductance only....

Full counting statistics of noncommuting variables: The case of spin counts

Statistics of transmission eigenvalues for a disordered quantum point contact