Atomtronics deals with matter-wave circuits of ultracold atoms manipulated through
magnetic or laser-generated guides with different shapes and intensities. In this way, new …

Quantum decay of a relativistic scalar field from a false vacuum is a fundamental idea in
quantum field theory. It is relevant to models of the early Universe, where the nucleation of …

We report on the confinement of a Bose–Einstein condensate in an annular trap with widely
tunable parameters. The trap relies on a combination of magnetic, optical and radio …

We study modes trapped in a rotating ring carrying the self-focusing (SF) or self-defocusing
(SDF) cubic nonlinearity and double-well potential cos 2 θ, where θ is the angular …

We study vortex formation in a Bose-Einstein condensate in a rotating double-well potential.
In addition to the ordinary quantized vortices and elusive ghost vortices,“hidden” vortices are …

Atomic Bose-Einstein condensates confined to a dual-ring trap support Josephson vortices
as topologically stable defects in the relative phase. We propose a test of the scaling laws for …

Vorticity in closed quantum fluid circuits is known to arise in the form of persistent currents. In
this work, we develop a method to engineer transport of the quantized vorticity between …

We present numerical simulations of the cavity optomechanical detection of persistent
currents and bright solitons in an atomic Bose-Einstein condensate confined in a ring trap …

A procedure is described whereby a linearly coupled spinor Bose condensate can be used
as a physically accessible quantum simulator of the early universe. In particular, an …

Coupled coaxially stacked toroidal condensates with persistent currents suggest an
appealing physical platform for investigation of various phenomena related to interacting …