Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures
Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures
复制标题
毫开温度下掺铒晶体中的电子自旋光谱扩散
DOI:
10.1103/physrevb.106.144412
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发表时间:
2022
影响因子:
3.7
通讯作者:
P. Bertet
中科院分区:
文献类型:
--
作者:
M. Rančić;M. Le Dantec;S. Lin;S. Bertaina;T. Chanelière;D. Serrano;P. Goldner;R. B. Liu;E. Flurin;D. Estève;D. Vion;P. Bertet
Erbium-doped crystals offer a versatile platform for hybrid quantum devices because they combine magnetically-sensitive electron-spin transitions with telecom-wavelength optical transitions. At the high doping concentrations necessary for many quantum applications, however, strong magnetic interactions of the electron-spin bath lead to excess spectral diffusion and rapid decoherence. Here we lithographically fabricate a 4.4 GHz superconducting planar micro-resonator on a CaWO 4 crystal doped with Er ions at a concentration of twenty parts per million relative to Ca. Using the microwave resonator, we characterize the spectral diffusion processes that limit the electron-spin coherence of Er ions at millikelvin temperatures by applying 2- and 3-pulse echo sequences. The coherence time shows a strong temperature dependence, reaching 1.3 ms at 23 mK for an electron-spin transition of 167 Er.
影响因子:
8.6
作者:
Probst, S.;Rotzinger, H.;Bushev, P. A.
通讯作者:
Bushev, P. A.