Back to Search
Start Over
Parity-Protected Superconductor-Semiconductor Qubit
- Source :
- Larsen , T W , Gershenson , M E , Casparis , L , Kringhj , A , Pearson , N J , McNeil , R P G , Kuemmeth , F , Krogstrup , P , Petersson , K D & Marcus , C M 2020 , ' Parity-Protected Superconductor-Semiconductor Qubit ' , Physical Review Letters , vol. 125 , no. 5 , 056801 .
- Publication Year :
- 2020
-
Abstract
- Coherence of superconducting qubits can be improved by implementing designs that protect the parity of Cooper pairs on superconducting islands. Here, we introduce a parity-protected qubit based on voltage-controlled semiconductor nanowire Josephson junctions, taking advantage of the higher harmonic content in the energy-phase relation of few-channel junctions. A symmetric interferometer formed by two such junctions, gate-tuned into balance and frustrated by a half-quantum of applied flux, yields a cos (2(phi)) Josephson element, reflecting coherent transport of pairs of Cooper pairs. We demonstrate that relaxation of the qubit can be suppressed tenfold by tuning into the protected regime.
Details
- Database :
- OAIster
- Journal :
- Larsen , T W , Gershenson , M E , Casparis , L , Kringhj , A , Pearson , N J , McNeil , R P G , Kuemmeth , F , Krogstrup , P , Petersson , K D & Marcus , C M 2020 , ' Parity-Protected Superconductor-Semiconductor Qubit ' , Physical Review Letters , vol. 125 , no. 5 , 056801 .
- Notes :
- Larsen, T. W., Gershenson, M. E., Casparis, L., Kringhj, A., Pearson, N. J., McNeil, R. P. G., Kuemmeth, F., Krogstrup, P., Petersson, K. D., Marcus, C. M.
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1263226215
- Document Type :
- Electronic Resource