Fast unconditional reset and leakage reduction in fixed-frequency transmon qubits
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arXiv
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2024
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| author | Chen, Liangyu Fors, Simon Pettersson Yan, Zixian Ali, Anaida Abad, Tahereh Osman, Amr Moschandreou, Eleftherios Lienhard, Benjamin Kosen, Sandoko Li, Hang-Xi Shiri, Daryoush Liu, Tong Hill, Stefan Amin, Abdullah-Al Rehammar, Robert Dahiya, Mamta Nylander, Andreas Rommel, Marcus Roudsari, Anita Fadavi Caputo, Marco Leif, Grönberg Govenius, Joonas Dobsicek, Miroslav Giannelli, Michele Faucci Kockum, Anton Frisk Bylander, Jonas Tancredi, Giovanna |
| author_facet | Chen, Liangyu Fors, Simon Pettersson Yan, Zixian Ali, Anaida Abad, Tahereh Osman, Amr Moschandreou, Eleftherios Lienhard, Benjamin Kosen, Sandoko Li, Hang-Xi Shiri, Daryoush Liu, Tong Hill, Stefan Amin, Abdullah-Al Rehammar, Robert Dahiya, Mamta Nylander, Andreas Rommel, Marcus Roudsari, Anita Fadavi Caputo, Marco Leif, Grönberg Govenius, Joonas Dobsicek, Miroslav Giannelli, Michele Faucci Kockum, Anton Frisk Bylander, Jonas Tancredi, Giovanna |
| contents | The realization of fault-tolerant quantum computing requires the execution of quantum error-correction (QEC) schemes, to mitigate the fragile nature of qubits. In this context, to ensure the success of QEC, a protocol capable of implementing both qubit reset and leakage reduction is highly desirable. We demonstrate such a protocol in an architecture consisting of fixed-frequency transmon qubits pair-wise coupled via tunable couplers -- an architecture that is compatible with the surface code. We use tunable couplers to transfer any undesired qubit excitation to the readout resonator of the qubit, from which this excitation decays into the feedline. In total, the combination of qubit reset, leakage reduction, and coupler reset takes only 83ns to complete. Our reset scheme is fast, unconditional, and achieves fidelities well above 99%, thus enabling fixed-frequency qubit architectures as future implementations of fault-tolerant quantum computers. Our protocol also provides a means to both reduce QEC cycle runtime and improve algorithmic fidelity on quantum computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16748 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Fast unconditional reset and leakage reduction in fixed-frequency transmon qubits Chen, Liangyu Fors, Simon Pettersson Yan, Zixian Ali, Anaida Abad, Tahereh Osman, Amr Moschandreou, Eleftherios Lienhard, Benjamin Kosen, Sandoko Li, Hang-Xi Shiri, Daryoush Liu, Tong Hill, Stefan Amin, Abdullah-Al Rehammar, Robert Dahiya, Mamta Nylander, Andreas Rommel, Marcus Roudsari, Anita Fadavi Caputo, Marco Leif, Grönberg Govenius, Joonas Dobsicek, Miroslav Giannelli, Michele Faucci Kockum, Anton Frisk Bylander, Jonas Tancredi, Giovanna Quantum Physics The realization of fault-tolerant quantum computing requires the execution of quantum error-correction (QEC) schemes, to mitigate the fragile nature of qubits. In this context, to ensure the success of QEC, a protocol capable of implementing both qubit reset and leakage reduction is highly desirable. We demonstrate such a protocol in an architecture consisting of fixed-frequency transmon qubits pair-wise coupled via tunable couplers -- an architecture that is compatible with the surface code. We use tunable couplers to transfer any undesired qubit excitation to the readout resonator of the qubit, from which this excitation decays into the feedline. In total, the combination of qubit reset, leakage reduction, and coupler reset takes only 83ns to complete. Our reset scheme is fast, unconditional, and achieves fidelities well above 99%, thus enabling fixed-frequency qubit architectures as future implementations of fault-tolerant quantum computers. Our protocol also provides a means to both reduce QEC cycle runtime and improve algorithmic fidelity on quantum computers. |
| title | Fast unconditional reset and leakage reduction in fixed-frequency transmon qubits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2409.16748 |