  The use of multiplexed atomic quantum memories (MAQM) can significantly
enhance the efficiency to establish entanglement in a quantum network. In the
previous experiments, individual elements of a quantum network, such as the
generation, storage and transmission of quantum entanglement have been
demonstrated separately. Here we report an experiment to show the compatibility
of these basic operations. Specifically, we generate photon-atom entanglement
in a $6\times 5$ MAQM, convert the spin wave to time-bin photonic excitation
after a controllable storage time, and then store and retrieve the photon in a
second MAQM for another controllable storage time. The preservation of quantum
information in this process is verified by measuring the state fidelity. We
also show that our scheme supports quantum systems with higher dimension than a
qubit.
