| Title: |
Selective excitation of superconducting qubits with a shared control line through pulse shaping |
| Authors: |
Matsuda, R.; Ohira, R.; Sumida, T.; Shiomi, H.; Machino, A.; Morisaka, S.; Koike, K.; Miyoshi, T.; Kurimoto, Y.; Sugita, Y.; Ito, Y.; Suzuki, Y.; Spring, P. A.; Wang, S.; Tamate, S.; Tabuchi, Y.; Nakamura, Y.; Ogawa, K.; Negoro, M. |
| Contributors: |
Japan Science and Technology Corporation; Ministry of Education, Culture, Sports, Science and Technology |
| Source: |
Physical Review Research ; volume 8, issue 1 ; ISSN 2643-1564 |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2026 |
| Description: |
In conventional architectures of superconducting quantum computers, each qubit is connected to its own control line, leading to a commensurate increase in the number of microwave lines as the system scales. Frequency-multiplexed qubit control addresses this problem by enabling multiple qubits to share a single microwave line. However, it can cause unwanted excitation of nontarget qubits, especially when the detuning between qubits is smaller than the pulse bandwidth. Here, we propose a selective-excitation-pulse (SEP) technique that suppresses unwanted excitations by shaping a drive pulse to create null points at nontarget qubit frequencies. In a proof-of-concept experiment with three fixed-frequency transmon qubits, we demonstrate that the SEP technique achieves single-qubit gate fidelities comparable to those obtained with conventional Gaussian pulses while effectively suppressing unwanted excitations in nontarget qubits. These results highlight the SEP technique as a promising tool for enhancing frequency-multiplexed qubit control. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1103/xw1s-dt16 |
| DOI: |
10.1103/xw1s-dt16/fulltext |
| Availability: |
https://doi.org/10.1103/xw1s-dt16; https://link.aps.org/article/10.1103/xw1s-dt16; http://harvest.aps.org/v2/journals/articles/10.1103/xw1s-dt16/fulltext |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.2BA8ACC8 |
| Database: |
BASE |