Quantum wave mixing and visualisation of coherent and superposed photonic states in a waveguide.
Quantum wave mixing and visualisation of coherent and superposed photonic states in a waveguide.
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DOI：
10.1038/s41467-017-01471-x
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发表时间：
2017-11-07
影响因子：
16.6
通讯作者：
Astafiev OV
中科院分区：
文献类型：
--
作者：
Dmitriev AY;Shaikhaidarov R;Antonov VN;Hönigl-Decrinis T;Astafiev OV
超导量子系统（人造原子）最近已成功用于演示微波范围内单原子量子光学的片上效应。特别是，当非线性介质缩小为单个量子散射体时，众所周知的四波混合效应可以揭示经典物理之外的一系列特征。在这里，我们演示了单个超导人造原子上的量子波混合（QWM）现象。在 QWM 中，弹性散射辐射的光谱是相互作用的叠加和相干光子态的直接图。此外，人造原子可以可视化光子态统计数据，通过量子态中有限（量化）数量的峰值来区分相干、一光子和两光子叠加态。我们的结果可能会给人造原子微波光学中的非线性量子效应带来新的见解。当缩小到量子水平时，波混合现象预计会表现出奇特的特征。在这里，作者展示了如何将在嵌入两能级人造原子的一维传输线中传播的相干电磁波映射成窄峰的量化频谱。
Superconducting quantum systems (artificial atoms) have been recently successfully used to demonstrate on-chip effects of quantum optics with single atoms in the microwave range. In particular, a well-known effect of four wave mixing could reveal a series of features beyond classical physics, when a non-linear medium is scaled down to a single quantum scatterer. Here we demonstrate the phenomenon of quantum wave mixing (QWM) on a single superconducting artificial atom. In the QWM, the spectrum of elastically scattered radiation is a direct map of the interacting superposed and coherent photonic states. Moreover, the artificial atom visualises photon-state statistics, distinguishing coherent, one- and two-photon superposed states with the finite (quantised) number of peaks in the quantum regime. Our results may give a new insight into nonlinear quantum effects in microwave optics with artificial atoms. The phenomenon of wave mixing is expected to show peculiar features when scaled down to the quantum level. Here, the authors show how coherent electromagnetic waves propagating in a 1D transmission line with an embedded two-level artificial atom are mapped into a quantised spectrum of narrow peaks.
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影响因子：
64.8
作者：
Kirchmair, Gerhard;Vlastakis, Brian;Schoelkopf, R. J.
通讯作者：
Schoelkopf, R. J.
影响因子：
8.6
作者：
Astafiev, O. V.;Abdumalikov, A. A., Jr.;Tsai, J. S.
通讯作者：
Tsai, J. S.
影响因子：
64.8
作者：
Schuster, D. I.;Houck, A. A.;Schoelkopf, R. J.
通讯作者：
Schoelkopf, R. J.
影响因子：
16.6
作者：
Peng ZH;de Graaf SE;Tsai JS;Astafiev OV
通讯作者：
Astafiev OV
影响因子：
8.6
作者：
Hoi, Io-Chun;Wilson, C. M.;Delsing, Per
通讯作者：
Delsing, Per