Category: Papers Published

By Posted on Posted in Group News, Papers Published

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 …

A Rapidly Expanding Bose-Einstein Condensate: An Expanding Universe in the Lab Read more »

By Posted on Posted in Group News, Papers Published, Theory

Ultracold bosons in optical lattices are one of the few systems where bosonic matter is known to exhibit strong correlations. Here we push the frontier of our understanding of interacting bosons in optical lattices by adding synthetic spin-orbit coupling, and …

Quantum phases of two-component bosons with spin-orbit coupling in optical lattices Read more »

By Posted on Posted in Group News, Papers Published

The book’s focuses on: Following an explosion of research on Bose–Einstein condensation (BEC) ignited by demonstration of the effect by 2001 Nobel prize winners Cornell, Wieman and Ketterle, this book surveys the field of BEC studies. Written by experts in …

Lindsay and Ian’s book chapter published: Universal Themes of Bose-Einstein Condensation Read more »

By Posted on Posted in Group News, Papers Published, RbLi

We describe a Fourier transform spectroscopy technique for directly measuring band structures, and apply it to a spin-1 spin–orbit coupled Bose–Einstein condensate. In our technique, we suddenly change the Hamiltonian of the system by adding a spin–orbit coupling interaction and …

Fourier transform spectroscopy of a spin–orbit coupled Bose gas Read more »

By Posted on Posted in Group News, Papers Published, RbK

Solitons, spatially localized, mobile excitations resulting from an interplay between nonlinearity and dispersion, are ubiquitous in physical systems from water channels and oceans to optical fibers and Bose–Einstein condensates (BECs). From our pulse throbbing at our wrists to rapidly moving …

Brownian motion of solitons in a Bose–Einstein condensate Read more »

By Posted on Posted in Atomtronics, Group News, Papers Published, RbLi

We observed a new mechanism for vortex nucleation in Bose–Einstein condensates (BECs) subject to synthetic magnetic fields. We made use of a strong synthetic magnetic field initially localized between a pair of merging BECs to rapidly create vortices in the …

Vortex nucleation in a Bose–Einstein condensate: from the inside out Read more »

By Posted on Posted in Group News, Papers Published, RbK, Theory

Synthetic gauge fields for ultracold neutral atoms—engineered using the interaction between laser fields and the atoms’ internal ‘spin’ degrees of freedom—provide promising techniques for generating the large (synthetic) magnetic fields required to reach the fractional quantum Hall (FQH) limit in …

Tutorial: Synthetic gauge potentials for ultracold neutral atoms Read more »