Novel polaron state for single impurity in a bosonic Mott insulator
Theoretical Division, Center for Nonlinear Studies, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
2 Center for Nanophase Materials Sciences, Oak Ridge National Laboratory - Oak Ridge, TN 37831, USA
3 Department of Physics and Astronomy, University of Wyoming - Laramie, WY 82071, USA
Accepted: 26 April 2012
We show that a single impurity embedded in a cold-atom bosonic Mott insulator leads to a novel polaron that exhibits correlated motion with an effective mass and a linear size that nearly diverge at a critical value of the on-site impurity-boson interaction strength. Cold-atom technology can tune the polaron's properties and break up the composite particle into a deconfined impurity-hole and boson particle state at finite, controllable polaron momentum.
PACS: 67.85.-d – Ultracold gases, trapped gases / 05.30.Jp – Boson systems / 67.60.Bc – Boson mixtures
© EPLA, 2012