Enhancement of the two-photon blockade effect via Van der Waals interaction

Enhancement of the two-photon blockade effect via Van der Waals interaction
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通过范德华相互作用增强双光子封锁效应

DOI:
10.3389/fphy.2022.979427
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发表时间:
2022-09
期刊:
Front. Phys.
影响因子:
--
通讯作者:
Yaping Yang
Yaping Yang
中科院分区:
其他
文献类型:
--
作者:
Kui Hou;Zhendong Zhang;Chengjie Zhu;Yaping Yang

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在腔-QED系统中,研究了两个三能级原子同时受泵浦场和耦合场相干驱动时,当光子关联函数g(2)(0)> 1和g(3)(0)< 1时,货车德瓦耳斯相互作用对双光子阻塞现象的影响.选择特定的耦合场频率,我们展示了电磁感应透明引起的能量分裂现象。相应地,在双光子共振频率附近可以实现双光子阻塞现象。利用两个原子里德伯态之间的货车德瓦耳斯相互作用,我们还证明了当两个原子同相或异相辐射时,双光子封锁都可以得到改善。结果,两个光子同时从腔中泄漏,但第三个光子被阻挡。这些结果在操纵光子态和产生非经典光源方面具有潜在的应用价值。
We theoretically investigate the influence of the Van der Waals interaction on the two-photon blockade phenomenon with the corresponding photon correlation functions g (2)(0) > 1 and g (3)(0) < 1 in a two-atom cavity-QED system, where two three-level ladder-type atoms are coherently driven by a pumping field and a coupling field simultaneously. Choosing a specific frequency of the coupling field, we show the energy splitting phenomenon caused by electromagnetically induced transparency. Correspondingly, the two-photon blockade phenomenon can be achieved near the two-photon resonant frequency. Using the Van der Waals interaction between the Rydberg states of the two atoms, we also show that the two-photon blockade can be improved when two atoms radiate in-phase or out-of-phase. As a result, two photons leak from the cavity simultaneously, but the third photon is blockaded. These results presented in this study hold potential applications in manipulating photon states and generating nonclassical light sources.
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