$^{138}$Ba$^+$ and $^{171}$Yb$^+$ Dual Species Modular Quantum Network

Trapped ions are a leading platform for quantum computing, with long coherence times and high fidelity operations. To address the challenge of scaling such systems, we utilize a modular architecture consisting of separate traps with photonic links for remote entanglement. In our experiment, each of two traps contain a $^{171}\textrm{Yb}^+$ memory qubit and a $^{138}\textrm{Ba}^+$ communication qubit. We report progress in the development of this system, including improvements in light collection, higher purity of the single photons generated for remote entanglement, increased fidelity in our ion-photon entanglement, and the construction of the second module. The outlook toward a three trap system and entanglement protocols for that system are discussed.