期刊
PHYSICAL REVIEW X
卷 8, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.8.021021
关键词
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资金
- ONR
- NSF through the Physics Frontier Center at the Joint Quantum Institute
- NSF [PHY-1407744, PHY-1708139]
- AFOSR's Quantum Matter Multidisciplinary University Research Initiative (MURI)
- NIST
- Direct For Mathematical & Physical Scien
- Division Of Physics [1407744, 1430094] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [GRANTS:13743930] Funding Source: National Science Foundation
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.
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