| 低通、带通电路在超导磁通量子比特测量中的应用 |
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| 引用本文： | 曹俊宇,孙国柱,王轶文,丛山桦,陈健,于扬,吴培亨. 低通、带通电路在超导磁通量子比特测量中的应用[J]. 稀有金属材料与工程, 2008, 0(Z4) |
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| 作者姓名： | 曹俊宇 孙国柱 王轶文 丛山桦 陈健 于扬 吴培亨 |
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| 作者单位： | 南京大学超导电子学研究所; |
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| 基金项目： | 国家自然科学基金(10704034,10534060); 国家“863”(2006AA03Z214); 国家“973”(2006CB601006) |
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| 摘 要： | 在测量超导磁通量子比特信息时,给出了低通和带通两种测量电路。低通电路采用双绞线,通过RC滤波器、铜粉滤波器,再接到样品上。该方法可以用于测量DC-SQUID结的跳变电流统计分布,从而获知量子比特的信息。带通电路用微波同轴线作为导线,通过衰减器、铜粉滤波器到样品上,再通过电容接地。该方法可以用于测量超导量子比特的量子化能级、迟豫时间、Rabi振荡等特性。
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| 关 键 词： | Josephson结 低通电路 带通电路 |
Applications of Low-Pass and Band-Pass Circuits in Measuring the Superconductor Flux Qubit |
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| Cao Junyu,Sun Guozhu,Wang Yiwen,Cong Shanhua,Chen Jian,Yu Yang,Wu Peiheng. Applications of Low-Pass and Band-Pass Circuits in Measuring the Superconductor Flux Qubit[J]. Rare Metal Materials and Engineering, 2008, 0(Z4) |
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| Authors: | Cao Junyu Sun Guozhu Wang Yiwen Cong Shanhua Chen Jian Yu Yang Wu Peiheng |
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| Affiliation: | Cao Junyu,Sun Guozhu,Wang Yiwen,Cong Shanhua,Chen Jian,Yu Yang,Wu Peiheng (Research Institute of Superconductor Electronics,Nanjing University,Nanjing 210093,China) |
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| Abstract: | We used low-pass circuit and band-pass circuit to measure the superconductor flux qubit. The low-pass circuit consists of twist pair lines, RC filter, and Cu-powder filter. With the low-pass circuit, we can get the switching current distribution of DC-SQUID and then the information of the qubit. The band-pass circuit consists of microwave coaxial cable, attenuators, Cu-powder filter and capacitance. With the band-pass circuit, we can measure the quantized energy levels, relaxation time and Rabi oscillation ... |
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| Keywords: | Josephson junction low-pass circuit band-pass circuit |
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