  SeCQC is an open-source program code which implements a Numerical Search for
the classical Capacity of Quantum Channels (SeCQC) by using an iterative
method. Given a quantum channel, SeCQC finds the statistical operators and POVM
outcomes that maximize the accessible information, and thus determines the
classical capacity of the quantum channel. The optimization procedure is
realized by using a steepest-ascent method that fol- lows the gradient in the
POVM space, and also uses conjugate gradients for speed-up.
