dorsal/arxiv
View SchemaThermodynamical aspects of the Casimir force between real metals at nonzero temperature
| Authors | V. B. Bezerra, G. L. Klimchitskaya, V. M. Mostepanenko |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0202018 |
| URL | https://arxiv.org/abs/quant-ph/0202018 |
| DOI | 10.1103/PhysRevA.65.052113 |
Abstract
We investigate the thermodynamical aspects of the Casimir effect in the case of plane parallel plates made of real metals. The thermal corrections to the Casimir force between real metals were recently computed by several authors using different approaches based on the Lifshitz formula with diverse results. Both the Drude and plasma models were used to describe a real metal. We calculate the entropy density of photons between metallic plates as a function of the surface separation and temperature. Some of these approaches are demonstrated to lead to negative values of entropy and to nonzero entropy at zero temperature depending on the parameters of the system. The conclusion is that these approaches are in contradiction with the third law of thermodynamics and must be rejected. It is shown that the plasma dielectric function in combination with the unmodified Lifshitz formula is in perfect agreement with the general principles of thermodynamics. As to the Drude dielectric function, the modification of the zero-frequency term of the Lifshitz formula is outlined that not to violate the laws of thermodynamics.
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"abstract": "We investigate the thermodynamical aspects of the Casimir effect in the case\nof plane parallel plates made of real metals. The thermal corrections to the\nCasimir force between real metals were recently computed by several authors\nusing different approaches based on the Lifshitz formula with diverse results.\nBoth the Drude and plasma models were used to describe a real metal. We\ncalculate the entropy density of photons between metallic plates as a function\nof the surface separation and temperature. Some of these approaches are\ndemonstrated to lead to negative values of entropy and to nonzero entropy at\nzero temperature depending on the parameters of the system. The conclusion is\nthat these approaches are in contradiction with the third law of thermodynamics\nand must be rejected. It is shown that the plasma dielectric function in\ncombination with the unmodified Lifshitz formula is in perfect agreement with\nthe general principles of thermodynamics. As to the Drude dielectric function,\nthe modification of the zero-frequency term of the Lifshitz formula is outlined\nthat not to violate the laws of thermodynamics.",
"arxiv_id": "quant-ph/0202018",
"authors": [
"V. B. Bezerra",
"G. L. Klimchitskaya",
"V. M. Mostepanenko"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.65.052113",
"title": "Thermodynamical aspects of the Casimir force between real metals at nonzero temperature",
"url": "https://arxiv.org/abs/quant-ph/0202018"
},
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