Phys. Rev. Lett. 96, 180403 (2006) [4 pages]
Localization of Bosonic Atoms by Fermionic Impurities in a Three-Dimensional Optical Lattice
Abstract
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Citing Articles
Received 6 April 2006; published 9 May 2006
We observe a localized phase of ultracold bosonic quantum gases in a 3-dimensional optical lattice induced by a small contribution of fermionic atoms acting as impurities in a Fermi-Bose quantum gas mixture. In particular, we study the dependence of this transition on the fermionic 40K impurity concentration by a comparison to the corresponding superfluid to Mott-insulator transition in a pure bosonic 87Rb gas and find a significant shift in the transition parameter. The observed shift is larger than expected based on a simple mean-field argument, which indicates that disorder-related effects play a significant role.
©2006 The American Physical Society
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