Energy budget of cosmological first-order phase transition in FLRW background

• 来源期刊: 中国科学:物理学 力学 天文学（英文版）
• 年，卷（期）: 2018,（8）
• 页码范围: 33-53
• 页数: 21页
• 语种: 英文

摘要

We study the hydrodynamics of bubble expansion in cosmological first-order phase transition in the Friedmann-Lema(i)tre-Robertson-Walker (FLRW) background with probe limit.Different from previous studies for fast first-order phase transition in flat background,we find that,for slow first-order phase transition in FLRW background with a given peculiar velocity of the bubble wall,the efficiency factor of energy transfer into bulk motion of thermal fluid is significantly reduced,thus decreasing the previously-thought dominated contribution from sound wave to the stochastic gravitational-wave background.