Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium
Qubit decoherence unavoidably degrades the fidelity of quantum logic gates. Accordingly, realizing gates that are as fast as possible is a guiding principle for qubit control, necessitating protocols for mitigating error channels that become significant as gate time is decreased. One such error chan...
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-12-01
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| Series: | PRX Quantum |
| Online Access: | http://doi.org/10.1103/PRXQuantum.5.040342 |
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| author | David A. Rower Leon Ding Helin Zhang Max Hays Junyoung An Patrick M. Harrington Ilan T. Rosen Jeffrey M. Gertler Thomas M. Hazard Bethany M. Niedzielski Mollie E. Schwartz Simon Gustavsson Kyle Serniak Jeffrey A. Grover William D. Oliver |
| author_facet | David A. Rower Leon Ding Helin Zhang Max Hays Junyoung An Patrick M. Harrington Ilan T. Rosen Jeffrey M. Gertler Thomas M. Hazard Bethany M. Niedzielski Mollie E. Schwartz Simon Gustavsson Kyle Serniak Jeffrey A. Grover William D. Oliver |
| author_sort | David A. Rower |
| collection | DOAJ |
| description | Qubit decoherence unavoidably degrades the fidelity of quantum logic gates. Accordingly, realizing gates that are as fast as possible is a guiding principle for qubit control, necessitating protocols for mitigating error channels that become significant as gate time is decreased. One such error channel arises from the counter-rotating component of strong, linearly polarized drives. This error channel is particularly important when gate times approach the qubit Larmor period and represents the dominant source of infidelity for sufficiently fast single-qubit gates with low-frequency qubits such as fluxonium. In this work, we develop and demonstrate two complementary protocols for mitigating this error channel. The first protocol realizes circularly polarized driving in circuit QED through simultaneous charge and flux control. The second protocol—commensurate pulses—leverages the coherent and periodic nature of counter-rotating fields to regularize their contributions to gates, enabling single-qubit gate fidelities reliably exceeding 99.997%. This protocol is platform independent and requires no additional calibration overhead. This work establishes straightforward strategies for mitigating counter-rotating effects from strong drives in circuit QED and other platforms, which we expect to be helpful in the effort to realize high-fidelity control for fault-tolerant quantum computing. |
| format | Article |
| id | doaj-art-112e7ea9e4e64fdebb0fc3ef60517918 |
| institution | Kabale University |
| issn | 2691-3399 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | PRX Quantum |
| spelling | doaj-art-112e7ea9e4e64fdebb0fc3ef605179182024-12-13T15:04:43ZengAmerican Physical SocietyPRX Quantum2691-33992024-12-015404034210.1103/PRXQuantum.5.040342Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with FluxoniumDavid A. RowerLeon DingHelin ZhangMax HaysJunyoung AnPatrick M. HarringtonIlan T. RosenJeffrey M. GertlerThomas M. HazardBethany M. NiedzielskiMollie E. SchwartzSimon GustavssonKyle SerniakJeffrey A. GroverWilliam D. OliverQubit decoherence unavoidably degrades the fidelity of quantum logic gates. Accordingly, realizing gates that are as fast as possible is a guiding principle for qubit control, necessitating protocols for mitigating error channels that become significant as gate time is decreased. One such error channel arises from the counter-rotating component of strong, linearly polarized drives. This error channel is particularly important when gate times approach the qubit Larmor period and represents the dominant source of infidelity for sufficiently fast single-qubit gates with low-frequency qubits such as fluxonium. In this work, we develop and demonstrate two complementary protocols for mitigating this error channel. The first protocol realizes circularly polarized driving in circuit QED through simultaneous charge and flux control. The second protocol—commensurate pulses—leverages the coherent and periodic nature of counter-rotating fields to regularize their contributions to gates, enabling single-qubit gate fidelities reliably exceeding 99.997%. This protocol is platform independent and requires no additional calibration overhead. This work establishes straightforward strategies for mitigating counter-rotating effects from strong drives in circuit QED and other platforms, which we expect to be helpful in the effort to realize high-fidelity control for fault-tolerant quantum computing.http://doi.org/10.1103/PRXQuantum.5.040342 |
| spellingShingle | David A. Rower Leon Ding Helin Zhang Max Hays Junyoung An Patrick M. Harrington Ilan T. Rosen Jeffrey M. Gertler Thomas M. Hazard Bethany M. Niedzielski Mollie E. Schwartz Simon Gustavsson Kyle Serniak Jeffrey A. Grover William D. Oliver Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium PRX Quantum |
| title | Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium |
| title_full | Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium |
| title_fullStr | Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium |
| title_full_unstemmed | Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium |
| title_short | Suppressing Counter-Rotating Errors for Fast Single-Qubit Gates with Fluxonium |
| title_sort | suppressing counter rotating errors for fast single qubit gates with fluxonium |
| url | http://doi.org/10.1103/PRXQuantum.5.040342 |
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