Decoherence characterization of three-dimensional transmon | Zendy

Zhao Hu | Zendy; Tiefu Li | Zendy; Liu Qichun | Zendy; Zhang Ying-Shan | Zendy; Jianshe Liu | Zendy; Wei Chen | Zendy

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Decoherence characterization of three-dimensional transmon

Author(s) -

Zhao Hu,

Tiefu Li,

Liu Qichun,

Zhang Ying-Shan,

Jianshe Liu,

Wei Chen

Publication year - 2014

Publication title -

acta physica sinica

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.

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