کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1857594 | 1529922 | 2009 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the Casimir energy for a massive quantum scalar field and the cosmological constant
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: On the Casimir energy for a massive quantum scalar field and the cosmological constant On the Casimir energy for a massive quantum scalar field and the cosmological constant](/preview/png/1857594.png)
چکیده انگلیسی
We present a rigorous, regularization-independent local quantum field theoretic treatment of the Casimir effect for a quantum scalar field of mass μâ 0 which yields closed form expressions for the energy density and pressure. As an application we show that there exist special states of the quantum field in which the expectation value of the renormalized energy-momentum tensor is, for any fixed time, independent of the space coordinate and of the perfect fluid form gμ,Î½Ï with Ï>0, thus providing a concrete quantum field theoretic model of the cosmological constant. This Ï represents the energy density associated to a state consisting of the vacuum and a certain number of excitations of zero momentum, i.e., the constituents correspond to lowest energy and pressure p⩽0.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Annals of Physics - Volume 324, Issue 10, October 2009, Pages 2095-2107
Journal: Annals of Physics - Volume 324, Issue 10, October 2009, Pages 2095-2107
نویسندگان
G. Gazzola, M.C. Nemes, W.F. Wreszinski,