A NOTE ON THE ANALOGY BETWEEN SUPERFLUIDS AND COSMOLOGY

被引：1
|
作者：
Naddeo, A. [1 ,2 ]
Scelza, G. [3 ]
机构：
[1] Univ Salerno, CNISM, Unita Ric Salerno, I-84081 Baronissi, Italy
[2] Univ Salerno, Dipartimento Fis ER Caianiello, I-84081 Baronissi, Italy
[3] Univ Geneva, Dept Phys Theor, CH-1211 Geneva, Switzerland
来源：
MODERN PHYSICS LETTERS B | 2010年 / 24卷 / 06期
关键词：
back-reaction; FRW; universe; BOSE-EINSTEIN CONDENSATION; GRAVITY; GAS;
D O I：
10.1142/S0217984910022573
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A new analogy between superfluid systems and cosmology is here presented, which relies strongly on the following ingredient: the back-reaction of the vacuum to the quanta of sound waves. We show how the presence of thermal phonons, the excitations above the quantum vacuum for T > 0, enable us to deduce an hydrodynamical equation formally similar to the one obtained for a perfect fluid in a Universe obeying the Friedmann-Robertson-Walker metric.
引用
收藏
页码：513 / 520
页数：8
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