流体运动的固有非线性和声学引力波记忆
Inherent nonlinearity of fluid motion and acoustic gravitational wave memory
摘要：
我们考虑非线性声波在静止理想流体中的传播。利用一维空间非线性声学的Riemann波动方程，证明了在波尾带有常密度扰动的波产生类似于引力波的声学记忆。对于一般为$nonlinear$的声存储器，有效时空动力学的非线性不是由于爱因斯坦方程，而是由于理想流体方程的非线性。为了具体起见，我们采用了箱陷玻色-爱因斯坦凝聚体，并提出了一种观察声学引力波记忆的实验方案。
英文摘要：
We consider the propagation of nonlinear sound waves in a perfect fluid at rest. By employing the Riemann wave equation of nonlinear acoustics in one spatial dimension, it is shown that waves carrying a constant density perturbation at their tails produce an acoustic analogue of gravitational wave memory. For the acoustic memory, which is in general $nonlinear$, the nonlinearity of the effective spacetime dynamics is not due to the Einstein equations, but due to the nonlinearity of the perfect fluid equations. For concreteness, we employ a box-trapped Bose-Einstein condensate, and suggest an experimental protocol to observe acoustic gravitational wave memory.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
