Intrinsic decoherence of entanglement of a single quantized field interacting with a two - level atom 單模光場與二能級原子的糾纏的內稟退相干
The casimir energy can be considered as the polarization of the vacuum energy of quantized fields due to the distortion caused by the presence of boundaries , curvature of the space - time manifold or some background fields Casimir能量本質上是由于邊界的出現、時空的彎曲或是某些背景場的存在而引起的量子場真空能量。
By calculating the feynman diagram in rtf , we find that when taking into account both the thermal photon emission , absorption and the virtual photon exchange processes , the infrared divergences at zero and finite temperature can be cancelled at the same time . the full quantum calculation results for soft photon radiation coincide completely with the poisson distribution obtained in the semiclassical approximation ( the coupling of the classical current and quantized field ) 通過實時溫度場論下的費曼圖計算,我們得到:將實光子的發射、吸收,虛光子的交換過程同時考慮時,零溫場論中出現的和由溫度效應引起的紅外發散都能得到消除;并且完全量子場論下的軟光子輻射幾率與半經典近似下(經典的電流和量子化的電磁場之間的耦合)得到的泊松分布結果完全一致。