Jul 22 – 25, 2019
ECT* - Villa Tambosi
Europe/Rome timezone
Abstracts submission open. Posters do not require abstract submission.

Rapidly expanding BEC ring: analog cosmology in a lab

Jul 24, 2019, 9:45 AM
45m
Meeting room (ECT* - Villa Tambosi)

Meeting room

ECT* - Villa Tambosi

Strada delle Tabarelle, 286 38123 - Villazzano (TN) Italy

Speaker

Ted Jacobson

Description

I will describe an experiment and some theory of an
expanding, ring-shaped Bose-Einstein condensate.
The expansion redshifts and damps 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.

Based on https://arxiv.org/abs/1710.05800

Primary authors

Presentation materials