| Title: |
Preliminary demonstration of a persistent Josephson phase-slip memory cell with topological protection |
| Authors: |
Ligato, N., Strambini, E., Paolucci, F., Giazotto, F. |
| Source: |
Nat Commun 12, 5200 (2021) |
| Publication Year: |
2020 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Superconductivity |
| More Details: |
Superconducting computing promises enhanced computational power in both classical and quantum approaches. Yet, scalable and fast superconducting memories are not implemented. Here, we propose a fully superconducting memory cell based on the hysteretic phase-slip transition existing in long aluminum nanowire Josephson junctions. Embraced by a superconducting ring, the memory cell codifies the logic state in the direction of the circulating persistent current, as commonly defined in flux-based superconducting memories. But, unlike the latter, the hysteresis here is a consequence of the phase-slip occurring in the long weak link and associated to the topological transition of its superconducting gap. This disentangle our memory scheme from the large-inductance constraint, thus enabling its miniaturization. Moreover, the strong activation energy for phase-slip nucleation provides a robust topological protection against stochastic phase-slips and magnetic-flux noise. These properties make the Josephson phase-slip memory a promising solution for advanced superconducting classical logic architectures or flux qubits.
Comment: 14 pages, 10 color figures |
| Document Type: |
Working Paper |
| DOI: |
10.1038/s41467-021-25209-y |
| Access URL: |
http://arxiv.org/abs/2005.14298 |
| Accession Number: |
edsarx.2005.14298 |
| Database: |
arXiv |
