Oct 16, 2026
“Integrating cavity arrays with atom arrays for quantum networks”
Date: October 16, 2026 |
9:30 am –
10:30 am
Speaker:
Justus Bruggenjurgen, UIBK
Location: Heinzel Seminar Room
Language:
English
Neutral atom arrays are a leading platform for quantum computation and simulation, offering identical qubits, programmability, and reconfigurable interactions. Integrating atom-arrays with photonic interfaces, like cavities, can enable sub-microsecond qubit readout, efficient atom-photon entanglement, and enable new quantum simulation capabilities through long-range interactions. However, scalable and efficient integration of atom-arrays with such photonic interfaces remains a major challenge.
We present an atom-array cavity-array platform integrating cesium atom arrays with a photonic chip containing over 100 nanophotonic crystal cavities. To enable this, we developed a background-free imaging scheme using excited-state transitions in cesium with >99% fidelity and a photonic chip design optimized for efficient atom loading and free-space coupling scheme achieving >65% waveguide-to-fiber coupling efficiency [1].
We demonstrate collisional-blockade limited loading of atom array next to photonic chip, parallel transport of atoms to multiple cavities, and achieving atom-cavity separations as small as 300 nm. At these distances, atom-photon interaction strengths exceeding 1 GHz are achievable. We present these capabilities along with our efforts toward single-photon extraction through atom-cavity coupling as well as multi-cavity addressing and coupling. These results address key integration challenges and pave the way for quantum networking and distributed quantum computing.
Dahlia Ghoshal, Nayana Tiwari, Carl Meeuw, Emily Schaffrath, Alex Korsch, Justus Brüggenjürgen, Hannes Bernien
[1] Menon, S. G., Glachman, N., Pompili, M., Dibos, A. & Bernien, H. An integrated atom array-nanophotonic chip platform with background-free imaging. Nat. Commun. 15, 6156 (2024).
