Rapid characterization of microscopic two-level systems using Landau-Zener transitions in a superconducting qubit | Zendy

Xinsheng Tan | Zendy; Haifeng Yu | Zendy; Yang Yu | Zendy; Siyuan Han | Zendy

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Rapid characterization of microscopic two-level systems using Landau-Zener transitions in a superconducting qubit

Author(s) -

Xinsheng Tan,

Haifeng Yu,

Yang Yu,

Siyuan Han

Publication year - 2015

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4930201

Subject(s) - flux qubit , qubit , phase qubit , superconductivity , zener diode , charge qubit , measure (data warehouse) , physics , population , superconducting quantum computing , condensed matter physics , quantum mechanics , quantum , computer science , voltage , demography , database , sociology , resistor

We demonstrate a fast method to detect microscopic two-level systems in a superconducting phase qubit. By monitoring the population leak after sweeping the qubit bias flux, we are able to measure the two-level systems that are coupled with the qubit. Compared with the traditional method that detects two-level systems by energy spectroscopy, our method is faster and more sensitive. This method supplies a useful tool to investigate two-level systems in solid-state qubits.

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