Emergence of spiral dark solitons in the merging of rotating Bose-Einstein condensates
arXiv:1803.03747 · doi:10.1007/s10909-018-2110-1
Abstract
Merging of isolated Bose-Einstein condensates (BECs) is an important topic due to its relevance to matter-wave interferometry and the Kibble-Zurek mechanism. Many past research focused on merging of BECs with uniform initial phases. In our recent numerical study (Phys. Rev. A 97, 013612 (2018)), we revealed that upon merging of rotating BECs with non-uniform initial phases, spiral-shaped dark solitons can emerge. These solitons facilitate angular momentum transfer and allow the merged condensate to rotate even in the absence of quantized vortices. More strikingly, the sharp endpoints of these spiral solitons can induce rotational motion in the BECs like vortices but with effectively a fraction of a quantized circulation. This paper reports our systematic study on the merging dynamics of rotating BECs. We discuss how the potential barrier that initially separates the BECs can affect the profile of the spiral solitons. We also show that the number of spiral solitons created in the BECs matches the relative winding number of the rotating BECs. The underlying mechanism of the observed soliton dynamics is explained.
arXiv comment9 pages, 9 figures
References in corpus (26)
- Cosmological Experiments in Condensed Matter Systems
- Bose-Einstein condensation of atoms in a uniform potential
- Spontaneous vortices in the formation of Bose-Einstein condensates
- Atom interferometry with Bose-Einstein condensates in a double-well potential
- Spontaneous creation of Kibble-Zurek solitons in a Bose-Einstein condensate
- Quench-induced supercurrents in an annular Bose gas
- Ring Dark Solitons and Vortex Necklaces in Bose-Einstein Condensates
- Interference of an array of independent Bose-Einstein condensates
- Vortex Formation by Interference of Multiple Trapped Bose-Einstein Condensates
- Solitary waves in clouds of Bose-Einstein condensed atoms
- Shear flow and Kelvin-Helmholtz instability in superfluids
- Cold Collision Frequency Shift of the 1S-2S Transition in Hydrogen
- Interference of Bose-Einstein Condensates on an Atom Chip
- Observation of Phase Defects in Quasi-2D Bose-Einstein Condensates
- Resistive flow in a weakly interacting Bose-Einstein condensate
- Observation of von Kármán Vortex Street in an Atomic Superfluid Gas
- Quantum Kelvin-Helmholtz instability in phase-separated two-component Bose-Einstein condensates
- Controlling the transverse instability of dark solitons and nucleation of vortices by a potential barrier
- Interferometric measurement of the current-phase relationship of a superfluid weak link
- Dynamics of Vortex Formation in Merging Bose-Einstein Condensate Fragments
- Dynamical excitations in the collision of 2D Bose-Einstein condensates
- Distortion of Interference Fringes and the Resulting Vortex Production of Merging Bose-Einstein Condensates
- Kelvin-Helmholtz instability in two-component Bose gases on a lattice
- Solitons and vortices in an evolving Bose-Einstein condensate
- Creation and revival of ring dark solitons in a toroidal Bose-Einstein condensate
- Rotation and Angular Momentum Transfer in Bose-Einstein Condensates Induced by Spiral Dark Solitons
Cited by in corpus (5)
- Connecting shear-flow and vortex array instabilities in annular atomic superfluids
- Symmetry breaking in interacting ring-shaped superflows of Bose-Einstein condensates
- Nonlinear dynamics of Josephson vortices in merging superfluid rings
- Dynamic instabilities and turbulence of merged rotating Bose-Einstein condensates
- Torquing the Condensate: Angular Momentum Transport in Bose-Einstein Condensates by Solitonic "Corkscrew"