Open AccessDecoherence characterization of three-dimensional transmon
Author(s) -
Huazhang Zhao,
Tiefu Li,
Qichun Liu,
Yingshan Zhang,
Jianshe Liu,
Wei Chen
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.220305
Subject(s) - quantum decoherence , transmon , rabi cycle , physics , qubit , oscillation (cell signaling) , quantum computer , quantum , nanosecond , quantum mechanics , relaxation (psychology) , condensed matter physics , chemistry , psychology , social psychology , laser , biochemistry
The decoherence time of superconducting qubit is one of the main parameters that determine whether superconducting quantum computation can be realized. This paper mainly focuses on three-dimensional (3D) transmon. The sample is fabricated on SiO substrate, and measured in 10 mK temperature. By measuring Rabi oscillation, energy relaxation, Ramsey oscillation and spin echo, the decoherence time constants of 3D transmon are characterized. The results show that the decoherence time is around several hundred nanoseconds. Based on the relationship of different decoherence time constant, we have the concludes that the possible reason to diminish the decoherence time is the defect in SiO substrate, but not the low frequency noises.