High-efficiency plug-and-play superconducting qubit networks
ORAL · Invited
Abstract
The ability to create entanglement between qubits that are not immediate neighbors enables modular quantum devices and high connectivity in quantum processors. Here, I will discuss our efforts to scale superconducting quantum circuits in a distributed and 'plug-and-play' fashion.
We have realized two-qubit gates with high fidelities through detachable and reconfigurable cable connections, enabling connectivity beyond single wafers [1]. We are aiming to combine these low-loss cable connections with programmable nonreciprocity, which will enable the realization of all-to-all connected quantum networks [2]. These tools provide means for advancing the scalability of superconducting quantum devices.
Additionally, the combination of low-loss interconnects and nonreciprocity provides an intriguing path toward autonomous stabilization of remote entanglement in cascaded quantum networks. I will introduce theoretical [3,4] and ongoing experimental efforts to realize such networks. This work may shed light on the question how distributed quantum states may be preserved in open systems.
[1] Mollenhauer, M., Irfan, A., Cao, X., Mandal, S. & Pfaff, W. arXiv:2407.16743 (2024).
[2] Cao, X., Irfan, A., Mollenhauer, M., Singirikonda, K. & Pfaff, W. arXiv:2405.15086 (2024).
[3] Lingenfelter, A. et al. Phys. Rev. X 14, 021028 (2024).
[4] Irfan, A. et al. Phys. Rev. Research 6, 033212 (2024).
We have realized two-qubit gates with high fidelities through detachable and reconfigurable cable connections, enabling connectivity beyond single wafers [1]. We are aiming to combine these low-loss cable connections with programmable nonreciprocity, which will enable the realization of all-to-all connected quantum networks [2]. These tools provide means for advancing the scalability of superconducting quantum devices.
Additionally, the combination of low-loss interconnects and nonreciprocity provides an intriguing path toward autonomous stabilization of remote entanglement in cascaded quantum networks. I will introduce theoretical [3,4] and ongoing experimental efforts to realize such networks. This work may shed light on the question how distributed quantum states may be preserved in open systems.
[1] Mollenhauer, M., Irfan, A., Cao, X., Mandal, S. & Pfaff, W. arXiv:2407.16743 (2024).
[2] Cao, X., Irfan, A., Mollenhauer, M., Singirikonda, K. & Pfaff, W. arXiv:2405.15086 (2024).
[3] Lingenfelter, A. et al. Phys. Rev. X 14, 021028 (2024).
[4] Irfan, A. et al. Phys. Rev. Research 6, 033212 (2024).
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Publication: [1] Mollenhauer, M., Irfan, A., Cao, X., Mandal, S. & Pfaff, W. arXiv:2407.16743 (2024).<br>[2] Cao, X., Irfan, A., Mollenhauer, M., Singirikonda, K. & Pfaff, W. arXiv:2405.15086 (2024).<br>[3] Lingenfelter, A. et al. Phys. Rev. X 14, 021028 (2024).<br>[4] Irfan, A. et al. Phys. Rev. Research 6, 033212 (2024).
Presenters
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Wolfgang Pfaff
University of Illinois at Urbana-Champaign
Authors
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Wolfgang Pfaff
University of Illinois at Urbana-Champaign