Cavity QED in the Ultrastrong Coupling Regime: Photon Bunching from the Emission of Individual Dressed Qubits,ACS Photonics

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Cavity QED in the Ultrastrong Coupling Regime: Photon Bunching from the Emission of Individual Dressed Qubits
ACS Photonics ( IF 6.5 ) Pub Date : 2017-09-07 00:00:00 , DOI: 10.1021/acsphotonics.7b00635
Luigi Garziano ₁ , Alessandro Ridolfo _{2,

3} , Simone De Liberato ₁ , Salvatore Savasta _{2,

3}

Affiliation

Photon antibunching in the light scattered by single quantum emitters is one of the hallmarks of quantum optics, providing an unequivocal demonstration of the quantized nature of the electromagnetic field. Antibunching can be intuitively understood by the need for a two-level system lying in its lower state after emitting a photon to be re-excited into the upper one before a second emission can take place. Here we show that such a picture breaks down in the ultrastrong light–matter coupling regime, when the coupling strength becomes comparable to the bare emitter frequency. Specializing to the cases of both a natural and an artificial atom, we thus show that a single emitter coupled to a photonic resonator can emit bunched light. The result presented herein is clear evidence of how the ultrastrong coupling regime is able to change the nature of individual atoms.

中文翻译：

超强耦合系统中的腔体QED：从单个打扮的量子位的发射中产生的光子束

由单个量子发射器散射的光中的光子反聚束是量子光学的标志之一，它清楚地证明了电磁场的量化性质。通过在发射光子后要在第二级发射之前将第二级系统置于其较低状态，便可以直观地理解反聚束。在这里，我们表明，当耦合强度变得与裸发射器频率相当时，这种图像在超强光-质耦合状态下会破裂。因此，我们专门研究天然原子和人造原子的情况，表明与光子谐振器耦合的单个发射器可以发射聚集的光。

更新日期：2017-09-07

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