Modulation of energy spectrum and control of coherent microwave transmission at single-photon level by longitudinal field in a superconducting quantum circuit

• 来源期刊: 中国物理B（英文版）
• 关键词: longitudinal field modulation (LFM) superconducting quantum circuit microwave photonics
• 年，卷（期）: 2018,（7）
• 页码范围: 384-390
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/7/074206

摘要

We study the effect of longitudinally applied field modulation on a two-level system using superconducting quantum circuits. The presence of the modulation results in additional transitions and changes the magnitude of the resonance peak in the energy spectrum of the qubit. In particular, when the amplitude λz and the frequency ωl of the modulation field meet certain conditions, the resonance peak of the qubit disappears. Using this effect, we further demonstrate that the longitudinal field modulation of the Xmon qubit coupled to a one-dimensional transmission line could be used to dynamically control the transmission of single-photon level coherent resonance microwave.