TY - JOUR
T1 - Polaron Physics in Optical Lattices
AU - Bruderer, Martin
AU - Klein, Alexander
AU - Clark, Stephen R.
AU - Jaksch, Dieter
PY - 2007/7/13
Y1 - 2007/7/13
N2 - We investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliubov phonons, and apply it to ultracold bosonic atoms in an optical lattice. We show that, with increasing BEC temperature, the transport properties of the impurities change from coherent to diffusive. Furthermore, stable polaron clusters are formed via a phonon-mediated off-site attraction.
AB - We investigate the effects of a nearly uniform Bose-Einstein condensate (BEC) on the properties of immersed trapped impurity atoms. Using a weak-coupling expansion in the BEC-impurity interaction strength, we derive a model describing polarons, i.e., impurities dressed by a coherent state of Bogoliubov phonons, and apply it to ultracold bosonic atoms in an optical lattice. We show that, with increasing BEC temperature, the transport properties of the impurities change from coherent to diffusive. Furthermore, stable polaron clusters are formed via a phonon-mediated off-site attraction.
KW - quant-ph
UR - http://dx.doi.org/10.1103/PhysRevA.76.011605
U2 - 10.1103/PhysRevA.76.011605
DO - 10.1103/PhysRevA.76.011605
M3 - Article
SN - 1050-2947
VL - 76
JO - Physical Review A: Atomic, Molecular, and Optical Physics
JF - Physical Review A: Atomic, Molecular, and Optical Physics
IS - 1
M1 - 011605(R)
ER -