Multi-level quantum noise spectroscopy.
Multi-level quantum noise spectroscopy.
复制标题
DOI:
10.1038/s41467-021-21098-3
复制
发表时间:
2021-02-11
影响因子:
16.6
通讯作者:
Oliver WD
中科院分区:
文献类型:
--
作者:
Sung Y;Vepsäläinen A;Braumüller J;Yan F;Wang JI;Kjaergaard M;Winik R;Krantz P;Bengtsson A;Melville AJ;Niedzielski BM;Schwartz ME;Kim DK;Yoder JL;Orlando TP;Gustavsson S;Oliver WD
System noise identification is crucial to the engineering of robust quantum systems. Although existing quantum noise spectroscopy (QNS) protocols measure an aggregate amount of noise affecting a quantum system, they generally cannot distinguish between the underlying processes that contribute to it. Here, we propose and experimentally validate a spin-locking-based QNS protocol that exploits the multi-level energy structure of a superconducting qubit to achieve two notable advances. First, our protocol extends the spectral range of weakly anharmonic qubit spectrometers beyond the present limitations set by their lack of strong anharmonicity. Second, the additional information gained from probing the higher-excited levels enables us to identify and distinguish contributions from different underlying noise mechanisms. Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to characterize two common types of external noise.
登录
查看更多内容
影响因子:
64.8
作者:
Arute, Frank;Arya, Kunal;Martinis, John M.
通讯作者:
Martinis, John M.
影响因子:
3.7
作者:
Christensen, B. G.;Wilen, C. D.;McDermott, R.
通讯作者:
McDermott, R.
影响因子:
38.3
作者:
Muhonen, Juha T.;Dehollain, Juan P.;Morello, Andrea
通讯作者:
Morello, Andrea
影响因子:
4.6
作者:
Braumuller, Jochen;Ding, Leon;Oliver, William D.
通讯作者:
Oliver, William D.
影响因子:
44.1
作者:
Paladino, E.;Galperin, Y. M.;Altshuler, B. L.
通讯作者:
Altshuler, B. L.