Bose-Einstein Condensates in Optical Lattices: Experiments

V. V. Tsyganok, D. A. Pershin, Vladimir Khlebnikov +10 more

Recently, thulium has been condensed to Bose-Einstein condensate. While the condensate of Thulium has a lot of applications in quantum simulations and other areas of physics, it can also serve as a unique diagnostic tool for many atomic experiments. In the present study, the Bose-Einstein condensate of Thulium was successfully loaded into an optical lattice and utilized to diagnose the lattice as well as detect unwanted reflections in the experiments with the 1064 nm optical lattice, which will further be used in a quantum gas microscope experiment.

Antoine Browaeys, J. V. Porto, S P. Peil +3 more

Michael J. Steel, Weiping Zhang

Summary form only given. Since the experimental realization of Bose-Einstein condensation in the magnetically trapped quantum atomic gases, there have now been an enormous quantity of theory devoted to the properties of the trapped Bose-Einstein condensates (BEC). Motivated by the existing experiments, the bulk of the theoretical work has assumed a harmonic trap. Although recently a few papers have considered the consequences of exposing a BEC to a periodic optical potential, BEC confined in an optical lattice is still a new topic in this area. In the work, we develop theory to study the stationary and propagating properties of a Bose-Einstein condensate in an optical lattice. Instead of using an infinite optical lattice, we study the realistic case where the BEC is formed in a finite trapping potential and then is exposed to an infinite periodic potential created by off-resonance multiple laser beams.

俊二 土屋

C. Fort, L. Fallani

We report a series of experiments performed on the dynamics of a Bose-Einstein condensate (BEC) in the presence of a periodic potential realized by means of an optical lattice. BEC allows to finely investigate properties of periodic potentials already known from the solid state physics, but also opens the field of non-linear matter waves in periodical structure where interesting new effects are predicted as for instance the dynamical instability.

M. Kr�mer, C. Menotti, Лев П. Питаевский +1 more