Characterization and Control of Measurement-Induced Dephasing on Superconducting Flux Qubit with a Josephson Bifurcation Amplifier
作者: Kosuke KakuyanagiYuichiro MatsuzakiTatsuya BabaHayato NakanoShiro SaitoKouichi Semba
刊名: Journal of the Physical Society of Japan, 2016, Vol.85 (10)
来源数据库: The physical Society of Japan
DOI: 10.7566/JPSJ.85.104801
原始语种摘要: Quantum measurements play a central role in quantum information processing. Understanding the mechanism of the quantum measurements is essential to both improve the visibility of the readout and decrease the projection error during measurement. Here, we describe and demonstrate an experimental protocol for quantifying a measurement backaction when we readout a superconducting flux qubit using a Josephson bifurcation amplifier. The coupling with the Josephson bifurcation amplifier induces a dephasing on the flux qubit during the readout. We have succeeded in estimating and controlling the strength of such a measurement-induced dephasing by changing the pulse height of the microwave driving. Our results are crucial for designing a suitable quantum readout technique for the realization of...
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关键词翻译
关键词翻译
  • readout 读出
  • visibility 可见度
  • projection 投射
  • demonstrate 说明
  • amplifier 放大器
  • processing 加工
  • quantum 量子
  • technique 技术
  • measurement 测量
  • describe 叙述