Scalable Fluxonium-Transmon Architecture for Error Corrected Quantum Processors
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912535697948672 |
|---|---|
| author | Heunisch, Lukas Huang, Longxiang Tasler, Stephan Schirk, Johannes Wallner, Florian Feulner, Verena Sarma, Bijita Liegener, Klaus Schneider, Christian M. F. Filipp, Stefan Hartmann, Michael J. |
| author_facet | Heunisch, Lukas Huang, Longxiang Tasler, Stephan Schirk, Johannes Wallner, Florian Feulner, Verena Sarma, Bijita Liegener, Klaus Schneider, Christian M. F. Filipp, Stefan Hartmann, Michael J. |
| contents | We propose a hybrid quantum computing architecture composed of alternating fluxonium and transmon qubits, that are coupled via transmon tunable couplers. We show that this system offers excellent scaling properties, characterized by engineered zero $ZZ$-crosstalk in the idle regime, a substantial reduction of level-crowding challenges through the alternating arrangement of different qubit types within the lattice, and parameter regimes that circumvent the capacitive loading problem commonly associated with fluxoniums. In numerical simulations, we show a parametrically driven CZ-gate that achieves a closed-system infidelity that is orders of magnitude below the coherence limit for gate durations $\gtrsim 30\,\rm{ns}$ using a two-tone flux pulse on the tunable coupler. Furthermore, we show that this gate scheme retains its fidelity in the presence of spectator qubits, making it a scalable solution for large lattices. Moreover, for the implementation of error correcting codes, our approach can leverage the long coherence times and large non-linearities of fluxoniums as data qubits, while fixed-frequency transmons with established readout techniques can serve as measurement ancillas. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_09267 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scalable Fluxonium-Transmon Architecture for Error Corrected Quantum Processors Heunisch, Lukas Huang, Longxiang Tasler, Stephan Schirk, Johannes Wallner, Florian Feulner, Verena Sarma, Bijita Liegener, Klaus Schneider, Christian M. F. Filipp, Stefan Hartmann, Michael J. Quantum Physics We propose a hybrid quantum computing architecture composed of alternating fluxonium and transmon qubits, that are coupled via transmon tunable couplers. We show that this system offers excellent scaling properties, characterized by engineered zero $ZZ$-crosstalk in the idle regime, a substantial reduction of level-crowding challenges through the alternating arrangement of different qubit types within the lattice, and parameter regimes that circumvent the capacitive loading problem commonly associated with fluxoniums. In numerical simulations, we show a parametrically driven CZ-gate that achieves a closed-system infidelity that is orders of magnitude below the coherence limit for gate durations $\gtrsim 30\,\rm{ns}$ using a two-tone flux pulse on the tunable coupler. Furthermore, we show that this gate scheme retains its fidelity in the presence of spectator qubits, making it a scalable solution for large lattices. Moreover, for the implementation of error correcting codes, our approach can leverage the long coherence times and large non-linearities of fluxoniums as data qubits, while fixed-frequency transmons with established readout techniques can serve as measurement ancillas. |
| title | Scalable Fluxonium-Transmon Architecture for Error Corrected Quantum Processors |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2508.09267 |