Driven-dissipative entanglement of distant giant atoms

Authors:Aziza Almanakly, Ariadna Soro, Alejandro Vivas-Viaña, Beatriz Yankelevich, Caspar Groiseau, David Pahl, Junyoung An, Gabriel Cutter, Michael E. Gingras, Bethany M. Niedzielski, Hannah Stickler, Renée DePéncier Piñero, Mollie E. Schwartz, Kyle Serniak, Max Hays, Jeffrey A. Grover, Anton Frisk Kockum, William D. Oliver

Abstract:Quantum interconnects distribute entanglement via controlled light-matter interactions for quantum computing and sensing applications. Many entanglement generation schemes use coherent, reversible interactions that require precisely calibrated pulses to execute. In contrast, driven-dissipative protocols use a continuous-wave drive in the presence of correlated dissipation to stabilize entanglement in protected (dark) states. However, the same dissipation that generates the entanglement also limits its utility once the stabilization protocol ends. Here, we engineer a superconducting system of two giant artificial atoms coupled sequentially to a waveguide, with tunable individual and correlated dissipation enabled by interference between coupling points. Continuously driving the atoms through the waveguide exploits correlated dissipation to generate remote entanglement. We then tune the qubit frequencies in situ to suppress individual dissipation and thereby preserve the entanglement, achieving a Bell-state fidelity F = 0.89 +/- 0.02. This demonstration indicates that the driven dissipation of giant atoms is a viable approach for distributing entanglement across quantum networks.

arXiv:2606.13375 [quant-ph]

(or arXiv:2606.13375v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2606.13375 arXiv-issued DOI via DataCite (pending registration)