Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation
Controlling the current-phase relation (CPR) of Josephson elements is essential for tailoring the eigenstates of superconducting qubits, tuning the properties of parametric amplifiers, and designing nonreciprocal superconducting devices. Here, we introduce the hybrid Josephson rhombus, a highly tuna...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-02-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.15.011021 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832540811304108032 |
|---|---|
| author | L. Banszerus C. W. Andersson W. Marshall T. Lindemann M. J. Manfra C. M. Marcus S. Vaitiekėnas |
| author_facet | L. Banszerus C. W. Andersson W. Marshall T. Lindemann M. J. Manfra C. M. Marcus S. Vaitiekėnas |
| author_sort | L. Banszerus |
| collection | DOAJ |
| description | Controlling the current-phase relation (CPR) of Josephson elements is essential for tailoring the eigenstates of superconducting qubits, tuning the properties of parametric amplifiers, and designing nonreciprocal superconducting devices. Here, we introduce the hybrid Josephson rhombus, a highly tunable superconducting circuit containing four semiconductor-superconductor hybrid Josephson junctions embedded in a loop. Combining magnetic frustration with gate-voltage-controlled tuning of individual Josephson couplings provides deterministic control of the harmonic content of the rhombus CPR. We show that, for balanced Josephson couplings at full frustration, the hybrid rhombus displays a π-periodic cos(2φ) potential, indicating coherent charge-4e transport. Tuning away from the balanced configuration, we observe a superconducting diode effect with efficiency exceeding 25%. These results showcase the potential of hybrid Josephson rhombi as fundamental building blocks for noise-resilient qubits and quantum devices with custom transport properties. |
| format | Article |
| id | doaj-art-9f98559742f8421791b3c947caef0562 |
| institution | Kabale University |
| issn | 2160-3308 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj-art-9f98559742f8421791b3c947caef05622025-02-04T15:03:07ZengAmerican Physical SocietyPhysical Review X2160-33082025-02-0115101102110.1103/PhysRevX.15.011021Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase RelationL. BanszerusC. W. AnderssonW. MarshallT. LindemannM. J. ManfraC. M. MarcusS. VaitiekėnasControlling the current-phase relation (CPR) of Josephson elements is essential for tailoring the eigenstates of superconducting qubits, tuning the properties of parametric amplifiers, and designing nonreciprocal superconducting devices. Here, we introduce the hybrid Josephson rhombus, a highly tunable superconducting circuit containing four semiconductor-superconductor hybrid Josephson junctions embedded in a loop. Combining magnetic frustration with gate-voltage-controlled tuning of individual Josephson couplings provides deterministic control of the harmonic content of the rhombus CPR. We show that, for balanced Josephson couplings at full frustration, the hybrid rhombus displays a π-periodic cos(2φ) potential, indicating coherent charge-4e transport. Tuning away from the balanced configuration, we observe a superconducting diode effect with efficiency exceeding 25%. These results showcase the potential of hybrid Josephson rhombi as fundamental building blocks for noise-resilient qubits and quantum devices with custom transport properties.http://doi.org/10.1103/PhysRevX.15.011021 |
| spellingShingle | L. Banszerus C. W. Andersson W. Marshall T. Lindemann M. J. Manfra C. M. Marcus S. Vaitiekėnas Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation Physical Review X |
| title | Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation |
| title_full | Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation |
| title_fullStr | Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation |
| title_full_unstemmed | Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation |
| title_short | Hybrid Josephson Rhombus: A Superconducting Element with Tailored Current-Phase Relation |
| title_sort | hybrid josephson rhombus a superconducting element with tailored current phase relation |
| url | http://doi.org/10.1103/PhysRevX.15.011021 |
| work_keys_str_mv | AT lbanszerus hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT cwandersson hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT wmarshall hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT tlindemann hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT mjmanfra hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT cmmarcus hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation AT svaitiekenas hybridjosephsonrhombusasuperconductingelementwithtailoredcurrentphaserelation |