Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit
Quasiparticles, especially the ones near the Josephson junctions in the superconducting qubits, are known as an important source of decoherence. By injecting quasiparticles into a quantum chip, we characterized the diffusion feature by measuring the energy relaxation time and the residual excited-st...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/17/8461 |
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| author | Yuqian Dong Yong Li Wen Zheng Yu Zhang Zhuang Ma Xinsheng Tan Yang Yu |
| author_facet | Yuqian Dong Yong Li Wen Zheng Yu Zhang Zhuang Ma Xinsheng Tan Yang Yu |
| author_sort | Yuqian Dong |
| collection | DOAJ |
| description | Quasiparticles, especially the ones near the Josephson junctions in the superconducting qubits, are known as an important source of decoherence. By injecting quasiparticles into a quantum chip, we characterized the diffusion feature by measuring the energy relaxation time and the residual excited-state population of a transmon qubit. From the extracted transition rates, we phenomenologically modeled the quasiparticle diffusion in a superconducting circuit that contained “hot” nonequilibrium quasiparticles in addition to low-energy ones. |
| first_indexed | 2024-03-10T03:04:30Z |
| format | Article |
| id | doaj.art-3b2d70daeaed4b57baedcd45221fc48b |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:04:30Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3b2d70daeaed4b57baedcd45221fc48b2023-11-23T12:39:56ZengMDPI AGApplied Sciences2076-34172022-08-011217846110.3390/app12178461Measurement of Quasiparticle Diffusion in a Superconducting Transmon QubitYuqian Dong0Yong Li1Wen Zheng2Yu Zhang3Zhuang Ma4Xinsheng Tan5Yang Yu6National Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaNational Laboratory of Solid State Microstructures, School of Physics, Nanjing University, Nanjing 210093, ChinaQuasiparticles, especially the ones near the Josephson junctions in the superconducting qubits, are known as an important source of decoherence. By injecting quasiparticles into a quantum chip, we characterized the diffusion feature by measuring the energy relaxation time and the residual excited-state population of a transmon qubit. From the extracted transition rates, we phenomenologically modeled the quasiparticle diffusion in a superconducting circuit that contained “hot” nonequilibrium quasiparticles in addition to low-energy ones.https://www.mdpi.com/2076-3417/12/17/8461superconducting qubitquasiparticlestransmon |
| spellingShingle | Yuqian Dong Yong Li Wen Zheng Yu Zhang Zhuang Ma Xinsheng Tan Yang Yu Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit Applied Sciences superconducting qubit quasiparticles transmon |
| title | Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit |
| title_full | Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit |
| title_fullStr | Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit |
| title_full_unstemmed | Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit |
| title_short | Measurement of Quasiparticle Diffusion in a Superconducting Transmon Qubit |
| title_sort | measurement of quasiparticle diffusion in a superconducting transmon qubit |
| topic | superconducting qubit quasiparticles transmon |
| url | https://www.mdpi.com/2076-3417/12/17/8461 |
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