Fig. 6
From: Broad spiral bandwidth of orbital angular momentum interface between photon and memory
The reconstructed density matrix for photonic entangled state \(\vert \psi \rangle _{{\rm{photon-photon}}}^{{\rm{30}},{\rm{-30}}}\). a, b are the real and imaginary parts of density matrix, respectively. Each data for reconstructing density matrices are recorded in 3000 s
