- Article
1 Citations
2,328 Views
13 Pages
The ground state and photoionization properties of Na
Atoms, Volume 11, Issue 8
2023 August - 6 articles
Cover Story: Superfluids in ring geometries can support quantized persistent currents, where the phase of the wavefunction winds by an integer multiple \({w}\) of \({2\pi}\) . We study the decay of these currents by numerically solving the Gross–Pitaevskii equation under the same conditions as the LENS experiment. By imprinting a phase, we excite currents of well-defined circulation, which are measured by the number of spirals appearing in the interferograms. Numerically, we observe that vortex emission is the source of the current instability, both in a clean ring, and in the presence of a localized defect. In particular, for the clean ring case reported in the cover, the imprinting profile’s imperfections introduce density excitations that for \({w \geq 5}\) favor vortex injection into the ring superfluid and limit the highest accessible circulation. View this paper
- Issues are regarded as officially published after their release is announced to the table of contents alert mailing list .
- You may sign up for email alerts to receive table of contents of newly released issues.
- PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Reader to open them.
Articles (6)
- Article
2,022 Views
12 Pages
For homogeneous driving, half cycle harmonics and its corresponding half cycle cutoff (HCO) show prominent spectral features, allowing one to produce an isolated attosecond pulse with suitable filtering, or vice versa the retrieval of the driving pul...
- Article
6 Citations
2,591 Views
21 Pages
We extend the two-centre wave-packet convergent close-coupling approach to doubly differential ionisation in proton collisions with H2 to intermediate projectile energies. The results for the doubly differential cross section at projectile energies f...
- Article
2 Citations
2,429 Views
12 Pages
The dynamic response of a Bell-and-Bloom magnetometer to a parallel (to the bias field) time-dependent field is studied by means of a model that goes beyond the commonly assumed quasi-static regime. The findings unveil features that are related to th...
- Article
3 Citations
2,515 Views
13 Pages
Polarons, quasiparticles resulting from the interaction between an impurity and the collective excitations of a medium, play a fundamental role in physics, mainly because they represent an essential building block for understanding more complex many-...
- Article
16 Citations
3,137 Views
12 Pages
We investigate the role of vortices in the decay of persistent current states of annular atomic superfluids by solving numerically the Gross–Pitaevskii equation, and we directly compare our results with the
Atoms - ISSN 2218-2004