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arXiv 1808.05482quant-phcond-mat.mes-hall
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利用纳米电动力学和超导电路量子电动力学的混合系统进行超宽范围光子数校准

Ultrawide-range photon number calibration using a hybrid system combining nano-electromechanics and superconducting circuit quantum electrodynamics

Philip Schmidt, Daniel Schwienbacher, Matthias Pernpeintner, Friedrich Wulschner, Frank Deppe, Achim Marx, Rudolf Gross, Hans Huebl

摘要:

我们提出了一个由超导共面波导谐振器耦合到纳米机械弦和transmon量子比特作为非线性电路元件组成的混合系统。我们进行光谱的transmon量子比特和纳米力学字符串。测量transmon量子比特上的ac-Stark位移以及弦上的机电诱导吸收,使我们能够确定微波谐振器中低功率和高功率状态下的平均光子数。通过这种方式,我们测量的光子数相差高达9个数量级。我们发现使用这两种方法的微波谐振腔中的光子数的校准之间的定量协议。我们的实验证明了超导电路,量子电动力学和纳米电动力学在单个芯片上的成功结合。

英文摘要:

We present a hybrid system consisting of a superconducting coplanar waveguide resonator coupled to a nanomechanical string and a transmon qubit acting as nonlinear circuit element. We perform spectroscopy for both the transmon qubit and the nanomechanical string. Measuring the ac-Stark shift on the transmon qubit as well as the electromechanically induced absorption on the string allows us to determine the average photon number in the microwave resonator in both the low and high power regimes. In this way, we measure photon numbers that are up to nine orders of magnitude apart. We find a quantitative agreement between the calibration of photon numbers in the microwave resonator using the two methods. Our experiments demonstrate the successful combination of superconducting circuit quantum electrodynamics and nano-electromechanics on a single chip.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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