Multiplet Supercurrents in a Josephson Circuit
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910825315303424 |
|---|---|
| author | Arnault, Ethan G. Chiles, John Larson, Trevyn F. Q. Chen, Chun-Chia Zhao, Lingfei Watanabe, Kenji Taniguchi, Takashi Amet, Francois Finkelstein, Gleb |
| author_facet | Arnault, Ethan G. Chiles, John Larson, Trevyn F. Q. Chen, Chun-Chia Zhao, Lingfei Watanabe, Kenji Taniguchi, Takashi Amet, Francois Finkelstein, Gleb |
| contents | Multiterminal Josephson junctions are a promising platform to host synthetic topological phases of matter and Floquet states. However, the energy scales governing topological protection in these devices are on the order of the spacing between Andreev bound states. Recent theories suggest that similar phenomena may instead be explored in circuits composed of two-terminal Josephson junctions, allowing for the topological protection to be controlled by the comparatively large Josephson energy. Here, we explore a Josephson circuit, in which three superconducting electrodes are connected through Josephson junctions to a common superconducting island. We demonstrate the dynamic generation of multiplet resonances, which have previously been observed in multiterminal Josephson junctions. The multiplets are found to be robust to elevated temperatures and are confirmed by exhibiting the expected Shapiro step quantization under a microwave drive. We also find an unexpected novel supercurrent, which couples a pair of contacts that are both voltage-biased with respect to the common superconducting island. We show that this supercurrent results from synchronization of the phase dynamics and pose the question whether it should also carry a topological contribution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_08362 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multiplet Supercurrents in a Josephson Circuit Arnault, Ethan G. Chiles, John Larson, Trevyn F. Q. Chen, Chun-Chia Zhao, Lingfei Watanabe, Kenji Taniguchi, Takashi Amet, Francois Finkelstein, Gleb Mesoscale and Nanoscale Physics Superconductivity Multiterminal Josephson junctions are a promising platform to host synthetic topological phases of matter and Floquet states. However, the energy scales governing topological protection in these devices are on the order of the spacing between Andreev bound states. Recent theories suggest that similar phenomena may instead be explored in circuits composed of two-terminal Josephson junctions, allowing for the topological protection to be controlled by the comparatively large Josephson energy. Here, we explore a Josephson circuit, in which three superconducting electrodes are connected through Josephson junctions to a common superconducting island. We demonstrate the dynamic generation of multiplet resonances, which have previously been observed in multiterminal Josephson junctions. The multiplets are found to be robust to elevated temperatures and are confirmed by exhibiting the expected Shapiro step quantization under a microwave drive. We also find an unexpected novel supercurrent, which couples a pair of contacts that are both voltage-biased with respect to the common superconducting island. We show that this supercurrent results from synchronization of the phase dynamics and pose the question whether it should also carry a topological contribution. |
| title | Multiplet Supercurrents in a Josephson Circuit |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2408.08362 |