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|Type:||Artigo de periódico|
|Title:||Thermodynamic Properties Of Fluids And The Quantum Vacuum|
Maia Jr. A.
|Abstract:||The thermodynamic behavior of a relativistic perfect simple fluid obeying the equation of state p=(-1), where 02 is a constant, is investigated. Particular cases include a vacuum (p=,=0), random cosmic strings (p=-1/3,=2/3), black-body radiation (p=1/3,=4/3), and stiff matter (p=,=2). Fluids with <1 become hotter when they expand adiabatically (TV1-). By assuming that such fluids may be regarded as a kind of generalized radiation, the general Planck-type form of the spectrum is deduced. As a limiting case, a new Lorentz-invariant spectrum of the vacuum which is compatible with the equation of state and other thermodynamic constraints is proposed. Some possible consequences to early universe physics are also discussed. © 1995 The American Physical Society.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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