In this talk, we present a demonstration of remote entanglement via chiral photon emission and absorption along a waveguide [1,2]. Superconducting qubits couple to the waveguide at multiple, well-separated locations through modules that deterministically emit and absorb single microwave photons. Using this architecture, we demonstrate directional single-photon emission with 96% fidelity and single-photon absorption exceeding 60% efficiency. We then use partial emission and absorption to generate remote entanglement – a four-qubit W-state – between qubits in the emitter and absorber modules with 62% fidelity. Time permitting, we will discuss a recent demonstration of dissipative entanglement stabilization [3]. These works along with 3D integration target modular and extensible quantum information processing mediated by quantum interconnects.
[1] B. Kannan, et al., Nature Physics 19, 394 (2023) | arXiv:2203.01430 (2022)
[2] A. Almanakly, et al., Nature Physics 21, 825 (2025) | arXiv:2408.05164 (2024)
[3] A. Almanakly, et al., arXiv:2606.13375 (2026)