Vantablack Shielding of Superconducting Qubit Systems
Vantablack Shielding of Superconducting Qubit Systems
复制标题
超导量子位系统的 Vantablack 屏蔽
DOI：
10.1007/s10909-022-02672-5
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发表时间：
2022
影响因子：
2
通讯作者：
Pollanen, J.
中科院分区：
文献类型：
--
作者：
Kitzman, J. M.;Lane, J. R.;Stefanski, T.;Beysengulov, N. R.;Tan, D.;Murch, K. W.;Pollanen, J.
超导量子比特系统的电路量子电动力学（cQED）实验通常采用涂覆在光子吸收材料中的辐射屏蔽来实现高量子比特相干性和低微波谐振器损耗。在这项工作中，我们提出了Vantablack作为一种新型的红外（IR）屏蔽材料的cQED系统的性能的初步结果。我们比较了一个单结transmon量子比特的相干特性和剩余激发态布居（或有效量子比特温度），该量子比特位于一个涂有标准环氧基红外吸收材料（即Berkeley Black）的屏蔽中，与涂有Vantablack的屏蔽中相同量子比特的相干性和有效温度。基于多量子比特相干测量的统计分析，我们发现涂覆有Vantablack的辐射屏蔽的性能与标准涂层的性能相当。然而，我们发现在Vantablack涂层屏蔽中，量子比特具有更高的有效温度。这些结果表明，可能需要改进以优化Vantablack作为超导量子比特实验的红外屏蔽材料的性能，我们讨论了这种改进的可能途径。最后，我们描述了未来可能的实验，以更精确地量化Vantablack的性能，以提高更复杂的cQED系统的相干性。
Circuit quantum electrodynamics (cQED) experiments on superconducting qubit systems typically employ radiation shields coated in photon absorbing materials to achieve high qubit coherence and low microwave resonator losses. In this work, we present preliminary results on the performance of Vantablack as a novel infrared (IR) shielding material for cQED systems. We compare the coherence properties and residual excited state population (or effective qubit temperature) of a single-junction transmon qubit housed in a shield coated with a standard epoxy-based IR absorbing material, i.e. Berkeley Black, to the coherence and effective temperature of the same qubit in a shield coated in Vantablack. Based on a statistical analysis of multiple qubit coherence measurements, we find that the performance of the radiation shield coated with Vantablack is comparable in performance to the standard coating. However, we find that in the Vantablack coated shield the qubit has a higher effective temperature. These results indicate that improvements are likely required to optimize the performance of Vantablack as an IR shielding material for superconducting qubit experiments and we discuss possible routes for such improvements. Finally, we describe possible future experiments to more precisely quantify the performance of Vantablack to improve the coherences of more complex cQED systems.
影响因子：
64.8
作者：
Wilen, C. D.;Abdullah, S.;McDermott, R.
通讯作者：
McDermott, R.
影响因子：
3.6
作者：
Kreikebaum, J. M.;Dove, A.;Siddiqi, I.
通讯作者：
Siddiqi, I.
影响因子：
4
作者：
Corcoles, Antonio D.;Chow, Jerry M.;Steffen, M.
通讯作者：
Steffen, M.