Inflationary dynamics and particle production in a toroidal Bose-Einstein condensate

被引：10

作者：

Bhardwaj, Anshuman ^{[1
]}

Vaido, Dzmitry ^{[1
]}

Sheehy, Daniel E. ^{[1
]}

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW A | 2021年 / 103卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.103.023322

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a theoretical study of the dynamics of a Bose-Einstein condensate (BEC) trapped inside an expanding toroid that can realize an analog 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 wave function. We show how particle creation would be revealed in the atom density and density correlations, and discuss connections to the cosmological theory of inflation.

引用

页数：13

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