Macroscopic quantum tunneling and qubit design parameters of Bi(2)Sr(2)CaCu(2)O(8+delta) surface intrinsic Josephson junctions
文献类型：期刊论文
| 作者 | Cui, DJ ; Yu, HF ; Peng, ZH ; Cao, W ; Zhu, XB ; Tian, Y ; Chen, GH ; Lin, DH ; Gu, CZ ; Zheng, DN ; Jing, XN ; Lu, L ; Zhao, SP |
| 刊名 | SUPERCONDUCTOR SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2008 |
| 卷号 | 21期号:12 |
| 关键词 | ZERO-VOLTAGE STATE TEMPERATURES QUANTIZATION OSCILLATIONS DISSIPATION SYSTEMS |
| ISSN号 | 0953-2048 |
| 通讯作者 | Cui, DJ: Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, POB 603, Beijing 100080, Peoples R China. |
| 中文摘要 | Macroscopic quantum tunneling (MQT) has been demonstrated recently in a Bi(2)Sr(2)CaCu(2)O(8+delta) surface intrinsic Josephson junction (SIJJ) with its critical current density J(c) below 100 A cm(-2) and its size below 1 mu m. In this work, we present a study of the switching current distributions of SIJJs fabricated on the same crystal, with J(c) > 500 A cm(-2) and size of 0.8 and 1.6 mu m. MQT is clearly observed, and the crossover from MQT to thermal activation (TA) is seen. Our analysis shows that the data agree well with the theoretical predictions of MQT and TA for different-sized SIJJs when parameters that roughly scale with the SIJJ size are used. In the crossover regime, the data are found to be better fitted by considering quantum corrections to TA. We discuss the realistic design of phase- and flux-type qubits using the experimentally attainable SIJJ parameters, which shows that the SIJJs, with their controllable J(c) and size (or junction capacitance), are feasible for qubit applications in the future. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [10474129, 10534060]; Ministry of Science and Technology of China [2006CB601007, 2006CB921107] |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41113]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Cui, DJ,Yu, HF,Peng, ZH,et al. Macroscopic quantum tunneling and qubit design parameters of Bi(2)Sr(2)CaCu(2)O(8+delta) surface intrinsic Josephson junctions[J]. SUPERCONDUCTOR SCIENCE & TECHNOLOGY,2008,21(12). |
| APA | Cui, DJ.,Yu, HF.,Peng, ZH.,Cao, W.,Zhu, XB.,...&Zhao, SP.(2008).Macroscopic quantum tunneling and qubit design parameters of Bi(2)Sr(2)CaCu(2)O(8+delta) surface intrinsic Josephson junctions.SUPERCONDUCTOR SCIENCE & TECHNOLOGY,21(12). |
| MLA | Cui, DJ,et al."Macroscopic quantum tunneling and qubit design parameters of Bi(2)Sr(2)CaCu(2)O(8+delta) surface intrinsic Josephson junctions".SUPERCONDUCTOR SCIENCE & TECHNOLOGY 21.12(2008). |
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来源：物理研究所
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