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arXiv 1006.3262quant-phhep-th
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金属球壳和圆柱壳电磁Casimir自能的半经典估计

Semiclassical Estimates of Electromagnetic Casimir Self-Energies of Spherical and Cylindrical Metallic Shells

Martin Schaden

摘要:

球形和圆柱形金属壳上电磁Casimir应力的半经典估计值在场理论值的1%以内。两种几何形状的电磁卡西米尔能量由两个解耦的无质量标量给出,满足共形协变边界条件。表面的贡献消失光滑的金属边界和有限的电磁Casimir能量在领先的半经典近似是由于二次波动的周期性射线在腔的内部。半经典地,金属圆柱壳的非零Casimir能量几乎完全是由于菲涅耳衍射。

英文摘要:

The leading semiclassical estimates of the electromagnetic Casimir stresses on a spherical and a cylindrical metallic shell are within 1% of the field theoretical values. The electromagnetic Casimir energy for both geometries is given by two decoupled massless scalars that satisfy conformally covariant boundary conditions. Surface contributions vanish for smooth metallic boundaries and the finite electromagnetic Casimir energy in leading semiclassical approximation is due to quadratic fluctuations about periodic rays in the interior of the cavity only. Semiclassically the non-vanishing Casimir energy of a metallic cylindrical shell is almost entirely due to Fresnel diffraction.

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