Josephson “flying qubit” revival: Flux-based control optimization
A decade ago, Josephson “flying qubits” based on adiabatic superconducting logic cells showed promise as quantum data buses , but their development stalled due to the incompatibility of traditional qubit control methods with their design. We revisit this concept by exploring the control of the inductively shunted two-junction superconducting interferometer (adiabatic quantum flux parametron, AQFP) in the quantum regime using unipolar magnetic field pulses generated by adiabatic superconducting electronics. Our research demonstrates the feasibility of high fidelity quantum operations (fidelity more than 99.99%) in this system via Landau–Zener tunneling. To this end, a method is proposed for selecting the duration and shape of control pulses to eliminate unwanted leakage into high-lying states in AQFP-based systems.
Authors
- P. V. Pikunov (ORCID: https://orcid.org/0000-0002-6634-8953)
- M. V. Bastrakova (ORCID: https://orcid.org/0000-0002-6597-563X)
- Andrey E. Schegolev (ORCID: https://orcid.org/0000-0002-5381-3297)
- D. S. Pashin (ORCID: https://orcid.org/0000-0002-7326-562X)
- N. V. Klenov (ORCID: https://orcid.org/0000-0001-6265-3670)
- I. I. Soloviev (ORCID: https://orcid.org/0000-0001-9735-2720)
Institutions
- Moscow Institute of Physics and Technology (RU)
- Lomonosov Moscow State University (RU)
- Russian Quantum Center (RU)
- N. I. Lobachevsky State University of Nizhny Novgorod (RU)
Publication Details
- Journal
- Chaos Solitons & Fractals
- Published
- 2025-04-04
- DOI
- https://doi.org/10.1016/j.chaos.2025.116353
- Citations
- 3
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 7.44
Funders
- Ministry of Education and Science of the Russian Federation
- Russian Science Foundation
- State Atomic Energy Corporation ROSATOM
- Foundation for the Advancement of Theoretical Physics and Mathematics