Mitigation of Magnetic Flux Trapping in Superconducting Electronics Using Moats
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2026
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866910241806876672 |
|---|---|
| author | Kapur, Rohan T. Tolpygo, Sergey K. Wynn, Alex Kehayias, Pauli Libson, Adam A. Muniz, Collin N. Gold, Michael J. Mallek, Justin L. Braje, Danielle A. Schloss, Jennifer M. |
| author_facet | Kapur, Rohan T. Tolpygo, Sergey K. Wynn, Alex Kehayias, Pauli Libson, Adam A. Muniz, Collin N. Gold, Michael J. Mallek, Justin L. Braje, Danielle A. Schloss, Jennifer M. |
| contents | Magnetic flux (vortex) trapping remains a major obstacle to very large scale integration in superconducting electronics. Moats -- etched regions in circuit layers placed in ground planes and around critical circuitry -- offer a simple passive approach to sequester flux. Here, we systematically examine the effectiveness of moat arrays in superconducting niobium films as a function of geometry (size, shape, and density) and background magnetic field. By measuring the vortex expulsion field, we estimate the flux saturation number and flux trapping temperature for a range of geometries. We find that many moat designs effectively sequester flux in magnetically shielded environments (< 1 $μ$T), with high-aspect-ratio rectangular "slit" moats providing the strongest mitigation at minimal area cost. However, our measurements show that moats alone do not eliminate flux trapping in non-ideal films, as vortices can preferentially pin at material defects. These results provide design guidance for flux mitigation in superconducting integrated circuits and highlight the need for combined optimization of circuit geometries and materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_18345 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Mitigation of Magnetic Flux Trapping in Superconducting Electronics Using Moats Kapur, Rohan T. Tolpygo, Sergey K. Wynn, Alex Kehayias, Pauli Libson, Adam A. Muniz, Collin N. Gold, Michael J. Mallek, Justin L. Braje, Danielle A. Schloss, Jennifer M. Superconductivity Applied Physics Magnetic flux (vortex) trapping remains a major obstacle to very large scale integration in superconducting electronics. Moats -- etched regions in circuit layers placed in ground planes and around critical circuitry -- offer a simple passive approach to sequester flux. Here, we systematically examine the effectiveness of moat arrays in superconducting niobium films as a function of geometry (size, shape, and density) and background magnetic field. By measuring the vortex expulsion field, we estimate the flux saturation number and flux trapping temperature for a range of geometries. We find that many moat designs effectively sequester flux in magnetically shielded environments (< 1 $μ$T), with high-aspect-ratio rectangular "slit" moats providing the strongest mitigation at minimal area cost. However, our measurements show that moats alone do not eliminate flux trapping in non-ideal films, as vortices can preferentially pin at material defects. These results provide design guidance for flux mitigation in superconducting integrated circuits and highlight the need for combined optimization of circuit geometries and materials. |
| title | Mitigation of Magnetic Flux Trapping in Superconducting Electronics Using Moats |
| topic | Superconductivity Applied Physics |
| url | https://arxiv.org/abs/2602.18345 |