Controllable single-photon frequency converter via a one-dimensional waveguide
Controllable single-photon frequency converter via a one-dimensional waveguide
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通过一维波导的可控单光子频率转换器
DOI：
10.1103/physreva.89.053813
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发表时间：
2014
影响因子：
2.9
通讯作者：
Sun C. P.
中科院分区：
文献类型：
--
作者：
Wang Z. H.;Zhou Lan;Li Yong;Sun C. P.
我们提出了一个通过一维波导耦合到三能级原子的单光子频率转换器。一个按需的经典驱动场被用来耦合到原子，允许它吸收一个给定频率的光子，然后发射一个不同频率的光子。我们在两种实际的物理系统中研究了这种单光子频率转换机制：具有余弦色散关系的耦合谐振腔波导系统和具有线性色散关系的波导系统。为了证明单光子传输效率，我们通过计算群速度引入了散射流的概念，发现驱动场在耦合谐振器波导中倾向于弱，而在线性波导中倾向于任意强，以实现最佳的传输效率。此外，我们证明了我们的理论模型是实验可行的，目前可用的技术。
We propose a single-photon frequency converter via a one-dimensional waveguide coupled to a three-level-type atom. An on-demand classical driving field is used to couple to the atom, allowing it to absorb a photon with a given frequency and then emit a photon with a different carried frequency. We study such a single-photon frequency conversion mechanism in two kinds of realistic physical systems: the system of coupled-resonator waveguide with cosine dispersion relation and the one of waveguide with linear dispersion relation. To demonstrate the single-photon transfer efficiency, we introduce the concept of scattering flows via the calculation of group velocities and find that the driving field prefers to be weak in the coupled-resonator waveguide but arbitrarily strong in the linear waveguide to achieve an optimal transfer efficiency. Furthermore, we demonstrate that our theoretical model is experimentally feasible with currently available technologies.