电磁场与物质耦合系统真空态和Casimir效应物理解释

采用一种简洁的方法讨论电磁场与物质耦合系统的能量本征态，在新的理论基础上给出关于Casimir效应物理根源的新的定性解释，采用类压缩态的假设找到了该耦合系统新的真空态，其能量比以往工作中量子力学二阶微扰方法给出的能量更低，该方法不仅适用于不同子体系间有弱相互作用的系数，给出系统能量更低的真空态，而且还能处理子体系间有较强相互作用的系统并给出其基态及能量的精确解析解，得出了对Casimir效应的物理解释，Casimir效应不是单纯来源于电磁场或物质的零点能的量子涨落，而是来源于电磁场与物质耦合系统真空态量子涨落，电磁场和物质对系统的真空态能量以及Casimir效应都有贡献。

New Vacuum State of the Electromagnetic Field-Matter Coupling System and the Physical Interpretation on Casimir Effect

A new concise method was presented for the calculation of the ground state energy of an electromagnetic field matter coupling system. With the assumption of the squeezed like state, a new vacuum state was obtained for the coupling system. The energy of the new vacuum state is lower than that given by the second order perturbation theory in the past works. In our theory, the Casimir effect is attributable neither to the quantum fluctuation in the zero point energy of the genuine electromagnetic field nor to that in the zero point energy of the genuine matter field, but to that in the vacuum state of the electromagnetic field matter coupling system. Both the electromagnetic field and matter field contribute to the vacuum state energy of the entire system and the Casimir effect.