Tan, XinshengYu, HaifengYu, YangHan, Siyuan2015-10-152015-10-152015-01Tan, Xinsheng, Haifeng Yu, Yang Yu, and Siyuan Han. "Rapid Characterization of Microscopic Two-level Systems Using Landau-Zener Transitions in a Superconducting Qubit." Appl. Phys. Lett. Applied Physics Letters 107.10 (2015): 102601. http://dx.doi.org/10.1063/1.4930201.https://hdl.handle.net/1808/18696This is the published version. Copyright 2015 American Institute of PhysicsWe 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.QubitsSuperconductivityHigh resolution spectroscopyRelaxation timesDephasingArticle10.1063/1.4930201openAccess