Critical spectrum of fluctuations for deconfinement at protoneutron star cores
Critical spectrum of fluctuations for deconfinement at protoneutron star cores
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原中子星核心解禁涨落的临界谱
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
A. G. Grunfeld
中科院分区：
文献类型：
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作者：
G. Lugones;A. G. Grunfeld
我们研究了质子中子星中强子物质向夸克物质的分解，重点研究了有限尺寸对嵌入强子环境中刚分解的彩色超导夸克液滴形成的影响。用有限温度下的非线性Walecka模型来模拟强子相，包括重子八极子和中微子俘获。对于夸克物质，我们使用包含彩色超导性的SU(3){sub f} Nambu-Jona-Lasinio模型。在多重反射展开的框架中考虑了刚定义液滴的有限尺寸效应。此外，我们认为刚定义的夸克物质在弱相互作用下是暂时的非平衡态，并在过渡过程中施加颜色中性和风味守恒。我们自一致地计算了夸克-强子界面的表面张力和曲率能量密度，发现它比文献中通常假设的值要大。在不同的温度和俘获条件下，计算了不同大小滴的跃迁密度。然后，我们表明能量密度波动比温度和中微子密度波动与解定义更相关。我们计算了能量密度波动的临界尺寸谱，它允许定义以及每个临界气泡的成核速率。我们发现，当物质达到核饱和密度5-6倍的体跃迁极限时，任何半径小于800 fm的液滴都可以快速形成。«少
We study the deconfinement of hadronic matter into quark matter in a protoneutron star focusing on the effects of the finite size on the formation of just deconfined color superconducting quark droplets embedded in the hadronic environment. The hadronic phase is modeled by the nonlinear Walecka model at finite temperature including the baryon octet and neutrino trapping. For quark matter we use an SU(3){sub f} Nambu-Jona-Lasinio model including color superconductivity. The finite size effects on the just deconfined droplets are considered in the frame of the multiple reflection expansion. In addition, we consider that just deconfined quark matter is transitorily out of equilibrium respect to weak interaction, and we impose color neutrality and flavor conservation during the transition. We calculate self-consistently the surface tension and curvature energy density of the quark hadron interphase and find that it is larger than the values typically assumed in the literature. The transition density is calculated for drops of different sizes, and at different temperatures and neutrino trapping conditions. Then, we show that energy density fluctuations are much more relevant for deconfinement than temperature and neutrino density fluctuations. We calculate the critical size spectrum of energy density fluctuations that allows deconfinement as well asmore » the nucleation rate of each critical bubble. We find that drops with any radii smaller than 800 fm can be formed at a huge rate when matter achieves the bulk transition limit of 5-6 times the nuclear saturation density.« less