  Photonic qubits memories are essential ingredients of numerous quantum
networking protocols. The ideal situation features quantum computing nodes that
are efficiently connected to quantum communication channels via quantum
interfaces. The nodes contain a set of long-lived matter qubits, the channels
support the propagation of light qubits, and the interface couples light and
matter qubits. Towards this vision, we here demonstrate a random-access
multi-qubit write-read memory for photons using two rubidium atoms coupled to
the same mode of an optical cavity, a setup which is known to feature quantum
computing capabilities. We test the memory with more than ten independent
photonic qubits, observe no noticeable cross talk, and find no need for
re-initialization even after ten write-read attempts. The combined write-read
efficiency is 26% and the coherence time approaches 1ms. With these features,
the node constitutes a promising building block for a quantum repeater and
ultimately a quantum internet.
