Quantum interference between photons from an atomic ensemble and a remote atomic ion
A. Craddock, J. Hannegan, D. Ornelas-Huerta, J. Siverns, A. Hachtel, E. Goldschmidt, James V. Porto, Q. Quraishi, S. Rolston
Many remote-entanglement protocols rely on the generation and interference of photons producedby nodes within a quantum network. Quantum networks based on heterogeneous nodes provide aversatile platform by utilizing the complimentary strengths of the differing systems. Implementationof such networks is challenging, due to the disparate spectral and temporal characteristics of thephotons generated by the different quantum systems. Here, we report on the observation of quantuminterference between photons generated from a single ion and an atomic ensemble. The photonsare produced on demand by each source located in separate buildings, in a manner suitable forquantum networking. Given these results, we analyze the feasibility of hybrid ion-ensemble remoteentanglement generation.