Macroscopic Angular Momentum States of Bose-Einstein Condensates in Toroidal Traps
| dc.creator | Benakli, M. | |
| dc.creator | Raghavan, S. | |
| dc.creator | Smerzi, A. | |
| dc.creator | Fantoni, S. | |
| dc.creator | Shenoy, S. R. | |
| dc.date | 1997-11-27 | |
| dc.date.accessioned | 2026-07-07T03:09:31Z | |
| dc.date.available | 2026-07-07T03:09:31Z | |
| dc.description | We consider a Bose-Einstein condensate (BEC) of $N$ atoms of repulsive interaction $\sim U_0$, in an elliptical trap, axially pierced by a Gaussian-intensity laser beam, forming an effective (quasi-2D) toroidal trap with minimum at radial distance $ρ= ρ_p$. The macroscopic angular momentum states $Ψ_l(ρ,θ) \sim \sqrt{N}Φ_l(ρ) e^{i l θ}$ for integer $l$ spread up to $ρ\lesssim ρ_{max} \sim (NU_0)^{1/4} \gg ρ_p$. The spreading lowers rotational energies, so estimated low metastability barriers can support large $l \lesssim l_{max} \sim (NU_0)^{1/4}, \lesssim 10$ for typical parameters. The $l$-dependent density profile $|Φ_l(ρ)|^2 - |Φ_0(ρ)|^2$ is a signature of BEC rotation. Results are insensitive to off-axis laser displacements $ρ_0$, for $ρ_0/ρ_{max} \ll 1$. | |
| dc.description | 4 pages, 2 figures (included), submitted to Phys. Rev. Lett | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9711295 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9711295 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/27918 | |
| dc.subject | Soft Condensed Matter | |
| dc.title | Macroscopic Angular Momentum States of Bose-Einstein Condensates in Toroidal Traps | |
| dc.type | text |