Seminarium Optyczne

In this talk I will present a recent demonstration of exotic darkstates in quantum gases of fermionic lithium where atommoleculecoherence is produced between a deeply bound singlet (or triplet)molecular level and atomic pairs in a weakly interacting Fermi gas at zerogauss or in the BECBCS crossover regime (i.e. Feshbach molecules orBCSlike pairs). We observe an abrupt and unanticipated change of theclassic EIT signature (Electromagnetically Induced Transparency) of thedarkstate (i.e. the suppression of single photon absorption to the excitedstate) in the vicinity of the broad Feshbach resonance at 832.2 Gpotentially indicating new physics not previously considered. I will alsodiscuss the feasibility of producing a Bose Einstein condensate of lithiumdimers in the absolute ground state.