Bauman Moscow State Technical University, 2nd Baumanskaya street 5/1, 105005 Moscow, Russia.
CNRS, Aix Marseille Université, PIIM, UMR 7345-F-13397 Marseille, France.
Phys Rev Lett. 2018 Aug 17;121(7):075003. doi: 10.1103/PhysRevLett.121.075003.
Thermoacoustic instability in a fluid monolayer complex plasma is studied for the first time. Experiments, theory, and simulations demonstrate that nonreciprocal effective interactions between particles (mediated by plasma flows) provide positive thermal feedback leading to acoustic sound amplification. The form of the generated sound spectra obtained both in experiments and simulations excellently agrees with theory, justifying thermoacoustic instability in the fluid complex plasma. The results indicate a physical analogy between collective fluctuation dynamics in reactive media and in systems with nonreciprocal effective interactions exposing an activation behavior.
首次研究了流体单层复杂等离子体中的热声不稳定性。实验、理论和模拟表明，颗粒之间的非互易有效相互作用（由等离子体流动介导）提供了正的热反馈，导致声波放大。在实验和模拟中获得的声谱形式与理论非常吻合，这证明了流体复杂等离子体中的热声不稳定性。结果表明，在具有非互易有效相互作用的系统中，活性介质中的集体涨落动力学与暴露激活行为的系统之间存在物理类比。
