| Title: |
Demonstrating a Long-Coherence Dual-Rail Erasure Qubit Using Tunable Transmons |
| Authors: |
Levine, H.; Haim, A.; Hung, J. S. C.; Alidoust, N.; Kalaee, M.; DeLorenzo, L.; Wollack, E. A.; Arrangoiz-Arriola, P.; Khalajhedayati, A.; Sanil, R.; Moradinejad, H.; Vaknin, Y.; Kubica, A.; Hover, D.; Aghaeimeibodi, S.; Alcid, J. A.; Baek, C.; Barnett, J.; Bawdekar, K.; Bienias, P.; Carson, H. A.; Chen, C.; Chen, L.; Chinkezian, H.; Chisholm, E. M.; Clifford, A.; Cosmic, R.; Crisosto, N.; Dalzell, A. M.; Davis, E.; D'Ewart, J. M.; Diez, S.; D'Souza, N.; Dumitrescu, P. T.; Elkhouly, E.; Fang, M. T.; Fang, Y.; Flammia, S.; Fling, M. J.; Garcia, G.; Gharzai, M. K.; Gorshkov, A. V.; Gray, M. J.; Grimberg, S.; Grimsmo, A. L.; Hann, C. T.; He, Y.; Heidel, S.; Howell, S.; Hunt, M.; Iverson, J.; Jarrige, I.; Jiang, L.; Jones, W. M.; Karabalin, R.; Karalekas, P. J.; Keller, A. J.; Lasi, D.; Lee, M.; Ly, V.; MacCabe, G.; Mahuli, N.; Marcaud, G.; Matheny, M. H.; McArdle, S.; McCabe, G.; Merton, G.; Miles, C.; Milsted, A.; Mishra, A.; Moncelsi, L.; Naghiloo, M.; Noh, K.; Oblepias, E.; Ortuno, G.; Owens, J. C.; Pagdilao, J.; Panduro, A.; Paquette, J.-P.; Patel, R. N.; Peairs, G.; Perello, D. J.; Peterson, E. C.; Ponte, S.; Putterman, H.; Refael, G.; Reinhold, P.; Resnick, R.; Reyna, O. A.; Rodriguez, R.; Rose, J.; Rubin, A. H.; Runyan, M.; Ryan, C. A.; Sahmoud, A.; Scaffidi, T.; Shah, B.; Siavoshi, S.; Sivarajah, P.; Skogland, T.; Su, C.-J.; Swenson, L. J.; Sylvia, J.; Teo, S. M.; Tomada, A.; Torlai, G.; Wistrom, M.; Zhang, K.; Zuk, I.; Clerk, A. A.; Brandão, F. G. S. L.; Retzker, A.; Painter, O. |
| Source: |
Physical Review X, 14(1), 011051, (2024-01) |
| Publisher Information: |
American Physical Society |
| Publication Year: |
2024 |
| Collection: |
Caltech Authors (California Institute of Technology) |
| Subject Terms: |
General Physics and Astronomy |
| Description: |
Quantum error correction with erasure qubits promises significant advantages over standard error correction due to favorable thresholds for erasure errors. To realize this advantage in practice requires a qubit for which nearly all errors are such erasure errors, and the ability to check for erasure errors without dephasing the qubit. We demonstrate that a “dual-rail qubit” consisting of a pair of resonantly coupled transmons can form a highly coherent erasure qubit, where transmon T ₁ errors are converted into erasure errors and residual dephasing is strongly suppressed, leading to millisecond-scale coherence within the qubit subspace. We show that single-qubit gates are limited primarily by erasure errors, with erasure probability p _( erasure) = 2.19 ( 2 ) × 10⁻³ per gate while the residual errors are ∼ 40 times lower. We further demonstrate midcircuit detection of erasure errors while introducing < 0.1 % dephasing error per check. Finally, we show that the suppression of transmon noise allows this dual-rail qubit to preserve high coherence over a broad tunable operating range, offering an improved capacity to avoid frequency collisions. This work establishes transmon-based dual-rail qubits as an attractive building block for hardware-efficient quantum error correction. ; Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. ; We thank the technical support from across the AWS Center for Quantum Computing, including the teams involved with theory, design, fabrication, device packaging, cryogenics, signals, software, procurement, and lab infrastructure. We also thank Simone Severini, Bill Vass, and AWS for supporting the quantum computing program. Finally, we thank Jeff Thompson, Manuel Endres, and David Schuster for helpful discussions and feedback on the manuscript. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://physics.aps.org/articles/v17/s35; https://authors.library.caltech.edu/communities/caltechauthors/; https://doi.org/10.1103/physrevx.14.011051 |
| DOI: |
10.1103/physrevx.14.011051 |
| Availability: |
https://doi.org/10.1103/physrevx.14.011051 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/legalcode |
| Accession Number: |
edsbas.A10AC386 |
| Database: |
BASE |