Engineering dipolar quantum matter via inter-layer interactions

Abstract

This thesis discusses how inter-layer dipole-dipole interactions (DDIs) introduce structural modifications in dipolar Bose-Einstein condensates (DBECs). We demonstrate this in a bi-layer system with three DBECs. We also discuss how this model can be extended to create a periodic 1D lattice. We have two or more trapped condensates in one layer, whereas in the second layer, we have an untrapped cigar-shaped one. With a proper choice of dipole orientations, the inter-layer DDIs effectively form a trapping potential for the condensate in the second layer, with non-trivial patterns in the potential landscape. The latter results in a non-trivial stable density pattern in the condensate in the second layer, offering a unique scenario of engineering a quantum matter in hand. We demonstrate control over the density profile and coherence of the matter-wave peaks. The technique we use here may also be helpful for the controlled generation of exotic states imitating supersolids - a long-sought-after state of matter with both crystal and superfluid character.