Figure 2
From: Linear Optics Simulation of Quantum Non-Markovian Dynamics
Scheme of principle of the simulation.
(a) A maximally entangled state of A and S is prepared. S and E then evolve through the application of free single-qubit gates (HE and HS) and joint two-qubits (
) ones. Time increases from bottom to top of the figure. Here 
stands for the polarization of the high (low) photon, while 
for the momentum of the low photon. (b) Each block of the scheme is technically realised by the concatenation of a BS and two HWPs oriented at different angles.
