TY - JOUR
T1 - Zoo of quantum phases and excitations of cold bosonic atoms in optical lattices
AU - Alon, Ofir E.
AU - Streltsov, Alexej I.
AU - Cederbaum, Lorenz S.
PY - 2005/7/15
Y1 - 2005/7/15
N2 - Quantum phases and phase transitions of weakly to strongly interacting bosonic atoms in deep to shallow optical lattices are described by a single multiorbital mean-field approach in real space. For weakly interacting bosons in one dimension, the critical value of the superfluid to Mott insulator (MI) transition found is in excellent agreement with many-body treatments of the Bose-Hubbard model. For strongly interacting bosons, (i)additional MI phases appear, for which two (or more) atoms residing in each site undergo a Tonks-Girardeau-like transition and localize, and (ii)on-site excitation becomes the excitation lowest in energy. Experimental implications are discussed.
AB - Quantum phases and phase transitions of weakly to strongly interacting bosonic atoms in deep to shallow optical lattices are described by a single multiorbital mean-field approach in real space. For weakly interacting bosons in one dimension, the critical value of the superfluid to Mott insulator (MI) transition found is in excellent agreement with many-body treatments of the Bose-Hubbard model. For strongly interacting bosons, (i)additional MI phases appear, for which two (or more) atoms residing in each site undergo a Tonks-Girardeau-like transition and localize, and (ii)on-site excitation becomes the excitation lowest in energy. Experimental implications are discussed.
UR - http://www.scopus.com/inward/record.url?scp=27144467681&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.95.030405
DO - 10.1103/PhysRevLett.95.030405
M3 - Article
AN - SCOPUS:27144467681
SN - 0031-9007
VL - 95
JO - Physical Review Letters
JF - Physical Review Letters
IS - 3
M1 - 030405
ER -