Ultrastrong-coupling regime of nondipolar light-matter interactions
Ultrastrong-coupling regime of nondipolar light-matter interactions
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DOI：
10.1103/physreva.98.053859
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发表时间：
2018-11-29
影响因子：
2.9
通讯作者：
Le Boite, Alexandre
中科院分区：
文献类型：
--
作者：
Felicetti, Simone;Hwang, Myung-Joong;Le Boite, Alexandre
我们提出了一个电路QED方案，它使得单量子比特和量子谐振腔之间的非偶极相互作用的超强耦合机制成为可能。我们表明，系统的哈密顿量是很好地近似的双光子量子拉比模型，并提出了一个简单的散射实验来探测其基本性质。特别是，我们确定了一个驱动方案，揭示了选择规则的变化，其特征在于击穿的行波近似和从强到超强双光子相互作用的过渡。最后，我们表明，在一个狭窄的光谱区域的频率拥挤是可观察到的输出荧光光谱的耦合强度接近崩溃点，铺平了道路，直接观察的发病的固态设备中的光谱崩溃。
We present a circuit-QED scheme which makes it possible to reach the ultrastrong-coupling regime of a nondipolar interaction between a single qubit and a quantum resonator. We show that the system Hamiltonian is well approximated by a two-photon quantum Rabi model and propose a simple scattering experiment to probe its fundamental properties. In particular, we identify a driving scheme that reveals the change in selection rules characterizing the breakdown of the rotating-wave approximation and the transition from strong to ultrastrong two-photon interactions. Finally, we show that a frequency crowding in a narrow spectral region is observable in the output fluorescence spectrum as the coupling strength approaches the collapse point, paving the way to the direct observation of the onset of the spectral collapse in a solid-state device.