戴维斯的研究侧重于宇宙论、量子场理论和太空生物学。
Davies' research focuses on cosmology, quantum field theory and astrobiology.
对于描述 电力学系统量子场理论的全部设备常常是多余的。
The full apparatus of quantum field theory is often unnecessary for describing electrodynamic systems.
运用相对论量子场理论，提出了一个相对论格林函数计算能带的近似方法。
Applying the theory of relativistic quantum field, the paper puts forward an approximate method to calculate electronic energy band with relativistic Green Function.
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