  The development of techniques that reduce experimental complexity and
minimize errors is an utmost importance for modeling quantum channels. In
general, quantum simulators are focused on universal algorithms, whose
practical implementation requires extra qubits necessary to control the quantum
operations. In contrast, our technique is based on finding a way to optimally
sum Kraus operators. These operators provide us with an experimentally
simplified setup where only a degree of freedom is needed to implement any
one-qubit quantum channel. Therefore, using entanglement polarized photon pairs
and post-processing techniques, we experimentally built the Kraus maps,
carrying out unitary and projection operations.
