Anharmonic parametric excitation in optical lattices -: art. no. 033403
Anno: 2001
Autori: Jburegui R., Poli N., Roati G., Modugno G.
Affiliazione autori: Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, México 01000, Distrito Federal, Mexico; INFM–European Laboratory for Nonlinear Spectroscopy (LENS), Università di Firenze, Largo Enrico Fermi 2, 50125 Firenze, Italy
Abstract: We study both experimentally and theoretically the losses induced by parametric excitation in far-off-resonance optical lattices. The atoms confined in a one-dimensional sinusoidal lattice present an excitation spectrum and dynamics substantially different from those expected for a harmonic potential. We develop a model based on the actual atomic Hamiltonian in the lattice and we introduce semiempirically a broadening of the width of lattice energy bands which can physically arise from inhomogeneities and fluctuations of the lattice, and also from atomic collisions. The position and strength of the parametric resonances and the evolution of the number of trapped atoms are satisfactorily described by our model.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 64 (3) Da Pagina: 33403-1 A: 33403-7
Parole chiavi: AtomsDOI: 10.1103/PhysRevA.64.033403Citazioni: 34dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
