Noronha Jorge, Spaliński Michał, Speranza Enrico
Illinois Center for Advanced Studies of the Universe and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
National Centre for Nuclear Research, 02-093 Warsaw, Poland.
Phys Rev Lett. 2022 Jun 24;128(25):252302. doi: 10.1103/PhysRevLett.128.252302.
We propose a new theory of second-order viscous relativistic hydrodynamics which does not impose any frame conditions on the choice of the hydrodynamic variables. It differs from Mueller-Israel-Stewart theory by including additional transient degrees of freedom, and its first-order truncation reduces to Bemfica-Disconzi-Noronha-Kovtun theory. Conditions for causality and stability are explicitly given in the conformal regime. As an illustrative example, we consider Bjorken flow solutions to our equations and identify variables which make a hydrodynamic attractor manifest.
我们提出了一种二阶粘性相对论流体动力学的新理论，该理论在流体动力学变量的选择上不施加任何参考系条件。它与米勒 - 伊斯雷尔 - 斯图尔特理论不同，因为它包含额外的瞬态自由度，并且其一阶截断简化为贝姆菲卡 - 迪斯科齐 - 诺罗尼亚 - 科夫通理论。在共形区域中明确给出了因果性和稳定性条件。作为一个示例，我们考虑我们方程的布约肯流解，并确定使流体动力学吸引子显现的变量。
