论文标题
环形玻璃纤维中的通货膨胀动力学和颗粒产生
Inflationary Dynamics and Particle Production in a Toroidal Bose-Einstein Condensate
论文作者
论文摘要
我们介绍了一项关于被困在不断扩展的环形内部的玻色网凝结物（BEC）的动力学的理论研究，该动力学可以实现模拟通货膨胀宇宙。随着系统的扩展，我们发现BEC中的声子由于环的薄度而由于量子压力效应而受到红移和阻尼。我们预测，快速扩展的环形BEC可以表现出自发的粒子创造，并在初始连贯的状态波函数的背景下研究这种现象。我们展示了如何在原子密度和密度相关性中揭示粒子的产生，并讨论与通货膨胀的宇宙学理论的联系。
We present a theoretical study of the dynamics of a Bose-Einstein condensate (BEC) trapped inside an expanding toroid that can realize an analogue inflationary universe. As the system expands, we find that phonons in the BEC undergo redshift and damping due to quantum pressure effects, owing to the thinness of the ring. We predict that rapidly expanding toroidal BEC's can exhibit spontaneous particle creation, and study this phenomenon in the context of an initial coherent state wavefunction. We show how particle creation would be revealed in the atom density and density correlations, and discuss connections to the cosmological theory of inflation.
