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Programmable soliton dynamics in all-Josephson-junction logic cells and networks.
Vsevolod I Ruzhickiy1,2, Anastasia A Maksimovskaya1,2,3, Sergey V Bakurskiy1,4
1Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics, Moscow, 119991, Russia.
Beilstein Journal of Nanotechnology
|November 5, 2025
Summary
Researchers achieved programmable control over soliton dynamics in all-Josephson-junction (all-JJ) networks using a novel tunable cell. This innovation enables on-demand switching and unidirectional soliton propagation, enhancing robustness in JJ logic circuits and neuromorphic systems.
Area of Science:
- Solid-state physics
- Quantum electronics
- Nonlinear dynamics
Background:
- Josephson junctions (JJs) are fundamental components in quantum electronics.
- Controlling soliton dynamics in JJ networks is crucial for advanced computing.
- Existing methods lack programmability and fine-tuned control.
Purpose of the Study:
- To demonstrate programmable control of kinetic soliton dynamics in all-Josephson-junction (all-JJ) networks.
- To introduce a novel tunable cell design for on-demand switching of transmission lines.
- To enhance the robustness of all-JJ logic circuits and neuromorphic systems.
Main Methods:
- Designed a novel tunable cell for all-JJ networks.
- Introduced structural asymmetry in transmission lines to create Josephson diodes.
- Utilized programmable kinetic inductance to control diode functionality.
- Engineered artificial inhomogeneity into circuit architecture.
Main Results:
- Achieved programmable control over kinetic soliton dynamics.
- Demonstrated on-demand switching of transmission lines with diverse dynamical modes.
- Implemented Josephson diodes for unidirectional soliton propagation.
- Successfully enabled/disabled diode functionality via kinetic inductance programmability.
Conclusions:
- The novel tunable cell design offers precise control over soliton dynamics in all-JJ networks.
- This approach enhances the robustness and functionality of all-JJ based logic circuits and neuromorphic computing systems.
- Programmable kinetic inductance is a key mechanism for advanced control in superconducting circuits.
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