Integrated Photonic Structures for Photon-Mediated Entanglement of Trapped Ions

Trapped atomic ions are natural candidates for quantum information processingand have the potential to realize or improve quantum computing, sensing, andnetworking. These applications often require the collection of individualphotons emitted from ions into guided optical modes, in some cases for theproduction of entanglement between separated ions. Proof-of-principledemonstrations of such photon collection from trapped ions have been performedusing high-numerical-aperture lenses and single-mode fibers, but integratedphotonic elements in ion-trap structures offer advantages in scalability andmanufacturabilty over traditional optics. In this paper we analyze structuresmonolithically fabricated with an ion trap for collecting single photons fromions, coupling them into integrated waveguides, and manipulating them viainterference. We discuss practical considerations for realizing photon-mediatedentanglement between trapped ions using these waveguide-based devices.