Naslov
Perturbative spectrum of trapped weakly interacting bosons in two dimensions

Autori
Bardek, Velimir ; Jonke, Larisa ; Meljanac, Stjepan

Izvornik
Physical Review A (1050-2947) 64 (2001), 1;

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
perturbative spectrum; Bose-Einstein condensation

Sažetak
We study a trapped Bose-Einstein condensate under rotation in the limit of weak, translational and rotational invariant two-particle interactions. We use the perturbation-theory approach (the large-N expansion) to calculate the ground-state energy and the excitation spectrum in the asymptotic limit where the total number of particles N goes to infinity while keeping the total angular momentum L finite. Calculating the probabilities of different configurations of angular momentum in the exact eigenstates gives us a clear view on the physical content of excitations. We briefly discuss the case of repulsive contact interaction.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA