Speaker
Description
Large-scale quantum processors will likely require modular architectures, and photon-mediated entanglement is a promising route to achieving high-fidelity interconnection using trapped ions. Current implementations rely on bulk photon-collection and interference optics, where mode-matching constraints and system-to-system variability impede scalability and limit the rates at which entangled pairs can be generated. To address these limitations, we demonstrate remote entanglement using an integrated photonics platform that enables passive phase stability, straightforward photonic manipulation, and intrinsic reproducibility. Specifically, we engineer waveguide-integrated gratings to couple photons emitted from trapped ions into single optical modes that are interfered on a multi-mode interferometer beam splitter within a microfabricated ion-trap chip, with detection of a single photon heralding entanglement between ions in separate trapping zones. The integrated collection gratings support straightforward multiplexing of remote entanglement in future devices. This demonstration could thus lay the foundation for scalable, high-rate, high-fidelity interconnects between modules of a distributed trapped-ion quantum computer.
| Academic level | PhD student |
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