Dark and bright-state polaritons in triple-Λ EIT system

Zhuan Li, Li-Sen Xu, Kaige Wang

Ding Jia-ling, Hou Bang-pin

Rui Zhang, Tao Wang, Zhong Chang Zhuo +2 more

M. Karthick Selvan

Properties of polaritons in triple-Λ EIT system are investigated using Sawada-Brout-Chong method. The role of dark and bright-state polaritons in the dynamics of the system is studied in detail by including the decay of excited atomic levels. Time evolution of entanglement of single and three-photon EIT modes within the system is shown to support this study.

Gong-Wei Lin, Jie Yang, Yueping Niu +1 more

We present a quantum-theoretical treatment of cavity linewidth narrowing with intracavity electromagnetically induced transparency (EIT). By means of intracavity EIT, the photons in the cavity are in the form of cavity polaritons: bright-state polariton and dark-state polariton. Strong coupling of the bright-state polariton to the excited state induces an effect known as vacuum Rabi splitting, whereas the dark-state polariton decoupled from the excited state induces a narrow cavity transmission window. Our analysis would provide a quantum theory of linewidth narrowing with a quantum field pulse.

Johannes Otterbach, Alexey Vyacheslavovich Gorshkov, Thomas Pohl +2 more