Strongly correlated states of a small cold atomic cloud from geometric gauge fields

Autor:	Juliá-Díaz, B., Dagnino, D., Günter, K. J., Grass, T., Barberán, N., Lewenstein, M., Dalibard, J.
Rok vydání:	2011
Předmět:	Condensed Matter - Quantum Gases Condensed Matter - Other Condensed Matter Condensed Matter - Strongly Correlated Electrons Quantum Physics
Zdroj:	Phys. Rev. A 84, 053605 (2011)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevA.84.053605
Popis:	Using exact diagonalization for a small system of cold bosonic atoms, we analyze the emergence of strongly correlated states in the presence of an artificial magnetic field. This gauge field is generated by a laser beam that couples two internal atomic states, and it is related to Berry's geometrical phase that emerges when an atom follows adiabatically one of the two eigenstates of the atom--laser coupling. Our approach allows us to go beyond the adiabatic approximation, and to characterize the generalized Laughlin wave functions that appear in the strong magnetic field limit. Comment: 8 pages, revised and enlarged version, to be published Phys. Rev. A
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1105.5021 Zobrazit plný text záznamu View this record from Arxiv