Thermal Field Dynamics Theory At Finite Temperature Casimir Effect

The Casimir effect is a pure quantum effect. The Casimir effect results from the alteration by the boundaries of the zero-point electromagnetic energy, and it is a direct manifestation of the boundary dependence of quantum vacuum. To make theory confide with experiments, it is necessary to correct the Casimir effect for real media including effects of nonzero temperature, finite conductivity of the boundary metal and surface roughness and also the combined effect of these important factors.There are several explanations for the Casimir effect. It is considered commonly that the Casimir force is the macroscopic manifestation of the van der Waals force between two neutral polarizable particles. In 1988, a scientist P. W. Milonni of New Mexico claimed a new simple viewpoint about the Casimir effect. He used the classically familiar concept radiation pressure to explain the Casimir effect. This explanation is a more abstract physical interpretation of the Casimir effect.Quantum optics is a most front science developed recently, and squeezed states is in the light of the research. The quantum fluctuation in a squeezed state can be less than that in a coherent state. So it is possible that the squeezed states can be play a most important role in quantum communication , quantum calculation and quantum measurements and so on. If we can prepare a mode of the electromagnetic field in an appropriately squeezed state, it will allow one to tune the signal-noise ratios of its quadrature components: one of the quadratures can be used to absorb the inevitable quantum-mechanical "noise", while the other one serves to transmit an extremely well-defined signal. In the context of quantized electromagnetic fields, it seems natural to also investigate the spatial properties of the field if the harmonic oscillators associated with the normal modes of the system are prepared in squeezed states.In 1975, two Japanese scientists claims the thermal field dynamics theory, which can make a thermal mechanics statistical state equal to a pure state. Some scientists have used this method to resolve some problems, and found that this theory can be very simple and convenient for the problems in finite temperature.In this paper, we use the thermal field dynamics theory to calculate the finite temperature correct of vacuum quantum electromagnetic field to the Casimir effect between two parallel conduct plates and the finite temperature correct ofsqueezed vacuum quantum electromagnetic field to the Casimir eflEect between two parallel conduct plates. Make it sure that fertilize the thermal field dynamics theory to calculate the correct to the Casimir effect in finite temperature. The result is also derived that the correction of squeezed state to the Casimir effect is a sin oscillation.