Gustavsson, Mattias; Haller, Elmar; Mark, Manfred; Danzl, Johann GIST Austria ; Rojas Kopeinig, Gabriel; Nägerl, Hanns
We report on the control of interaction-induced dephasing of Bloch oscillations for an atomic Bose-Einstein condensate in an optical lattice. We quantify the dephasing in terms of the width of the quasimomentum distribution and measure its dependence on time for different interaction strengths which we control by means of a Feshbach resonance. For minimal interaction, the dephasing time is increased from a few to more than 20 thousand Bloch oscillation periods, allowing us to realize a BEC-based atom interferometer in the noninteracting limit.
Physical Review Letters
We thank A. Daley for theoretical support and for help with setting up the numerical calculations and A. Buchleitner and his group for useful discussions. We are grateful to A. Liem and H. Zellmer for valuable assistance in setting up the 1064 nm fiber amplifier system. We acknowledge contributions by P. Unterwaditzer and T. Flir during the early stages of the experiment. We are indebted to R. Grimm for generous support and gratefully acknowledge funding by the Austrian Ministry of Science and Research (BMWF) and the Austrian Science Fund (FWF).
Gustavsson M, Haller E, Mark M, Danzl JG, Rojas Kopeinig G, Nägerl H. Control of interaction-induced dephasing of bloch oscillations. Physical Review Letters. 2008;100(8). doi:10.1103/PhysRevLett.100.080404
Gustavsson, M., Haller, E., Mark, M., Danzl, J. G., Rojas Kopeinig, G., & Nägerl, H. (2008). Control of interaction-induced dephasing of bloch oscillations. Physical Review Letters, 100(8). https://doi.org/10.1103/PhysRevLett.100.080404
Gustavsson, Mattias, Elmar Haller, Manfred Mark, Johann G Danzl, Gabriel Rojas Kopeinig, and Hanns Nägerl. “Control of Interaction-Induced Dephasing of Bloch Oscillations.” Physical Review Letters 100, no. 8 (2008). https://doi.org/10.1103/PhysRevLett.100.080404.
M. Gustavsson, E. Haller, M. Mark, J. G. Danzl, G. Rojas Kopeinig, and H. Nägerl, “Control of interaction-induced dephasing of bloch oscillations,” Physical Review Letters, vol. 100, no. 8, 2008.
Gustavsson M, Haller E, Mark M, Danzl JG, Rojas Kopeinig G, Nägerl H. 2008. Control of interaction-induced dephasing of bloch oscillations. Physical Review Letters. 100(8).
Gustavsson, Mattias, et al. “Control of Interaction-Induced Dephasing of Bloch Oscillations.” Physical Review Letters, vol. 100, no. 8, American Physical Society, 2008, doi:10.1103/PhysRevLett.100.080404.