Tunable photon blockade with a single atom in a cavity under electromagnetically induced transparency
Tunable photon blockade with a single atom in a cavity under electromagnetically induced transparency
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电磁感应透明下空腔中单个原子的可调谐光子封锁
DOI：
10.1364/prj.419275
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发表时间：
2021-06
影响因子：
7.6
通讯作者：
Lee Chaohong
中科院分区：
文献类型：
--
作者：
Tang Jing;Deng Yuangang;Lee Chaohong
我们提出了一种利用电磁感应透明（EIT）实现强光子封锁的实验方案，该方法将单个碱土金属原子捕获在光学腔中。在存在光学Stark位移的情况下，二阶相关函数和腔体传输在腔体的红蓝侧带之间呈现不对称结构。对于弱控制场，相干透明窗口（即原子准暗态共振）的光子量子统计量对Stark位移不敏感，利用EIT的固有暗态极化子，Stark位移也应免疫激发态的自发发射。有趣的是，通过利用Stark位移和控制场之间的相互作用，原子准暗态共振的强光子封锁同时具有最优的二阶相关函数g(2)(0) ~ 10−4和高腔透射。其物理机制归因于Stark位移增强的谱非调和性，并且EIT具有强的非线性，具有损失不敏感的原子准暗态共振，这与传统的关于在腔-EIT中出现Kerr非线性的观点有本质的不同。我们的研究结果揭示了一种实现高质量单光子源的新策略，为空腔量子电动力学中非经典量子态的工程化开辟了新的途径。
We present an experimental proposal to achieve a strong photon blockade by employing electromagnetically induced transparency (EIT) with a single alkaline-earth-metal atom trapped in an optical cavity. In the presence of optical Stark shift, both the second-order correlation function and cavity transmission exhibit asymmetric structures between the red and blue sidebands of the cavity. For a weak control field, the photon quantum statistics for the coherent transparency window (i.e., atomic quasi-dark-state resonance) are insensitive to the Stark shift, which should also be immune to the spontaneous emission of the excited state by taking advantage of the intrinsic dark-state polariton of EIT. Interestingly, by exploiting the interplay between the Stark shift and control field, the strong photon blockade at atomic quasi-dark-state resonance has an optimal second-order correlation function g(2)(0)∼10−4 and a high cavity transmission simultaneously. The underlying physical mechanism is ascribed to the Stark shift enhanced spectrum anharmonicity and the EIT hosted strong nonlinearity with loss-insensitive atomic quasi-dark-state resonance, which is essentially different from the conventional proposal with emerging Kerr nonlinearity in cavity-EIT. Our results reveal a new strategy to realize high-quality single photon sources, which could open up a new avenue for engineering nonclassical quantum states in cavity quantum electrodynamics.
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影响因子：
19.6
作者：
Chang, D. E.;Gritsev, V.;Demler, E. A.
通讯作者：
Demler, E. A.
影响因子：
2.9
作者：
S. Rebic;A. Parkins;S. Tan
通讯作者：
S. Rebic;A. Parkins;S. Tan
DOI：
10.1088/1464-4266/1/4/322
发表时间：
1999-08
期刊：
Journal of Optics-nouvelle Revue D Optique
影响因子：
--
作者：
S. Rebic;S. Tan;A. Parkins;D. Walls
通讯作者：
S. Rebic;S. Tan;A. Parkins;D. Walls
影响因子：
8.6
作者：
Duan, LM;Kimble, HJ
通讯作者：
Kimble, HJ
影响因子：
2.9
作者：
S. Rebic;A. Parkins;S. Tan
通讯作者：
S. Rebic;A. Parkins;S. Tan