Phase control of asymmetrical Mollow sideband in a Delta-type superconducting artificial atom
Phase control of asymmetrical Mollow sideband in a Delta-type superconducting artificial atom
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Delta型超导人造原子中不对称莫洛边带的相位控制
DOI：
10.1016/j.optcom.2018.10.007
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发表时间：
2019
影响因子：
2.4
通讯作者：
Li Jingyan
中科院分区：
文献类型：
--
作者：
Wang Fei;Li Jingyan
研究了利用超导量子电路（SQCs）实现的三能级Δ组态人工原子的共振荧光光谱（RFS）。由于原子的镜像对称性破缺，存在一个循环跃迁结构，即三个微波场同时作用于原子，驱动相应的原子跃迁。我们发现，微波荧光光子可以在精确的单光子，双光子和三光子共振条件下发射。这与自然原子不同，自然原子中的荧光由于暗态共振而被完全猝灭。更有趣的是，它是注意到，红（蓝）边带的抑制或增强可以通过所施加的微波场的相对相位控制。通过着装状态分析可以了解其内在机制。固态器件中的相敏RFS在全光开关设计和量子信息处理中具有潜在的应用价值。
We investigate the resonance fluorescence spectrum (RFS) from a three-level Δ-configuration artificial atom, which is realized using superconducting quantum circuits (SQCs). There exists a cyclic transition structure due to the broken mirror symmetry, in which three microwave fields are simultaneously applied to drive the corresponding atomic transitions. We find that the microwave fluorescence photons can be emitted on exact one-, two-and three-photon resonance conditions. This is different from natural atom, in which the fluorescence is completely quenched due to dark-state resonance. More interestingly, it is noted that the suppression or enhancement of red (blue) sideband can be controlled by the relative phase of the applied microwave fields. The internal mechanism can be understood based on dressed-state analysis. The phase-sensitive RFS from solid-state devices may find potential application in designing all-optical switch and quantum information processing.