论文标题
二阶非线性诱导杂种木腔QED系统中的多部分纠缠
Second order nonlinearity induced multipartite entanglement in a hybrid magnon cavity QED system
论文作者
论文摘要
我们提出了一项提案，以在混合镁含量QED系统中产生两分和三方纠缠。两个宏观的Yttrium铁石榴石（YIG）球体通过磁偶极相互作用耦合到单模微波腔，而腔光子是通过泵场引起的两个光子过程产生的。使用平均场理论，我们表明，二阶非线性可以在两个条件下，即$Δ_Cδ_{M} = 2G^2 $和$Δ_C=-Δ__{M} $。对于后来的一种，我们还显示了在两种宏伟模式和三方纠缠之间产生两部分纠缠的可能性。结合了这两个条件，我们进一步得出了第三个条件，即$Δ_m^2- ϕ^2+2g^2 = 0 $，当两个宏伟的谐振频率不同时，可以实现三方纠缠。
We present a proposal to produce bipartite and tripartite entanglement in a hybrid magnon-cavity QED system. Two macroscopic yttrium iron garnet (YIG) spheres are coupled to a single-mode microwave cavity via magnetic dipole interaction, while the cavity photons are generated via the two photon process induced by a pump field. Using the mean field theory, we show that the second order nonlinearity can result in strong bipartite entanglement between cavity photons and magnonic modes under two conditions, i.e., $δ_c δ_{m}=2g^2$ and $δ_c=-δ_{m}$. For the later one, we also show the possibility for producing the bipartite entanglement between two magnonic modes and tripartite entanglement among the cavity photons and two magnonic modes. Combining these two conditions, we further derive a third condition, i.e., $δ_m^2-ϕ^2+2g^2=0$, where the tripartite entanglement can be achieved when two magnonic modes have different resonant frequencies.
