Ultrastrong Coupling Few-Photon Scattering Theory.

Ultrastrong Coupling Few-Photon Scattering Theory.
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DOI:
10.1103/physrevlett.120.153602
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发表时间:
2017-01
影响因子:
8.6
通讯作者:
T. Shi;Yue Chang;J. García-Ripoll
T. Shi;Yue Chang;J. García-Ripoll
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
T. Shi;Yue Chang;J. García-Ripoll

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我们研究了超强耦合到波导上的二能级系统对单个光子的散射。对于大范围的耦合,散射是弹性的,可以用一个有效的U(1)对称哈密顿量来描述。这个简单的模型允许预测散射共振线的形状,验证到α=0.3时,并且接近图卢兹点α=1/2,在那里非弹性散射变得相关。我们的预测是超导电路的模型实验[P.Forn-Díaz等人,NAT。太棒了。13,39(2017年)NPAHAX1745-247310.1038/NPhys3905],并可扩展到研究多光子散射。
We study the scattering of individual photons by a two-level system ultrastrongly coupled to a waveguide. The scattering is elastic for a broad range of couplings and can be described with an effective U(1)-symmetric Hamiltonian. This simple model allows the prediction of scattering resonance line shapes, validated up to α=0.3, and close to the Toulouse point α=1/2, where inelastic scattering becomes relevant. Our predictions model experiments with superconducting circuits [P. Forn-Díaz et al., Nat. Phys. 13, 39 (2017)NPAHAX1745-247310.1038/nphys3905] and can be extended to study multiphoton scattering.