A rapidly expanding Bose-Einstein condensate: an expanding universe in the lab

Autor:	Eckel, S., Kumar, A., Jacobson, T., Spielman, I. B., Campbell, G. K.
Rok vydání:	2017
Předmět:	Condensed Matter - Quantum Gases General Relativity and Quantum Cosmology High Energy Physics - Theory
Zdroj:	Phys. Rev. X 8, 021021 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevX.8.021021
Popis:	We study the dynamics of a supersonically expanding ring-shaped Bose-Einstein condensate both experimentally and theoretically. The expansion redshifts long-wavelength excitations, as in an expanding universe. After expansion, energy in the radial mode leads to the production of bulk topological excitations -- solitons and vortices -- driving the production of a large number of azimuthal phonons and, at late times, causing stochastic persistent currents. These complex nonlinear dynamics, fueled by the energy stored coherently in one mode, are reminiscent of a type of "preheating" that may have taken place at the end of inflation. Comment: 12 pages, 7 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1710.05800 Zobrazit plný text záznamu View this record from Arxiv