1205.0644 (Bimalendu Deb)
Bimalendu Deb
We present a theory for efficiently manipulating d-wave interaction of cold atoms with two lasers driving two free-bound resonant photoassociative transitions. For atoms having magnetic moment, a magnetic field induced s-wave Feshbach resonance can augment the efficiency of d-wave manipulation due to anisotropic nature of scattering with multiple transition pathways. We show that the two lasers generate a coherence between two excited diatomic bound states causing suppression of inelastic scattering in strong-coupling regime. We propose an experimental scheme to realize the predicted coherence effect. We present results of a model calculation with two-component fermionic $^6$Li atoms. Our results show strong enhancement of anisotropic d-wave scattering with interatomic axis oriented predominantly along the axis of quantization. Our method of manipulating d-wave interaction may be important for realizing d-wave superconductivity-like phase in two-component Fermi gas of atoms.
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http://arxiv.org/abs/1205.0644
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