Experimental realization of the Haldane model?
Not yet in graphene… but with cold atoms trapped in optical lattices!
Cold atoms condensed matter
cold atoms
photonics
start-up of cold atom physics...
cooling and trapping
controlling interactions
(one) basic idea (there are several!): exploit the Doppler effect
laser frequency
resonance frequency
n=1
n=2
Next step: load the cooled atoms into an optical lattice
counter-propagating laser beams
trapping potential from dipole force:the oscillating electric light field from a laser inducesan oscillating dipole moment in the atom while at the same time interacts with this dipole moment
Next step: load the cooled atoms into an optical lattice
counter-propagating laser beams
trapping potential from dipole force:the oscillating electric light field from a laser inducesan oscillating dipole moment in the atom while at the same time interacts with this dipole moment
the counterpropagating beams createa standing wave pattern which givesan extended periodic trapping potential,a ”crystal of light” with tight-binding atoms
Feshbach resonance:
Hermann Feshbach (1954)
Two famous cold-atom experiments probing quantum matter: