of same colored atoms is genuine multipartite entanglement, while two sets with different colors do not have the relationship of entanglement.[]{data-label="f1"}](figure1.pdf){width="1\linewidth"}

![**Dynamical evolution of the multipartite entanglement.** The verification results of witness and dynamical evolution of $M$ values with different storage time. The different $M$ values of corresponding theoretical lower bound curves of witness are 10 to $10^{6}$ from right to left. The $M$ values for experimental datas are 5, 6, 10, 14, 92 and 1000 in the right subgragh. Error bars are derived by Poisson distribution of photon number statistics from avalanche photo diodes.[]{data-label="f2"}](figure2.pdf){width="1.0\linewidth"}

![ **Decoherence of the multipartite entanglement.** **a.** The variations of $p_{1}$ probabilities. **b.** The crosscorrelation $g_{S-AS}^{(2)}$ between correlated stokes photon and anti-stokes photon is in the left side (as pink dots show); the autocorrelation $g_{AS_{1}-AS_{2}|S}^{(2)}$ of the retrieved anti-Stokes photon by a heralded Stokes photon is in the right side (as blue dots show). Error bars are derived by Poisson distribution of photon number statistics from avalanche photo diodes. **c.** The evolution of entanglement depth varies with the storage time of quantum memory.[]{data-label="f3"}](figure3.pdf){width="1.0\linewidth"}

![ **Measured entanglement depth with different excitation probabilities.** **a.** The $M$ values with different excitation probabilities are 14, 5, 5, and the 