Preparation and detection of d-wave superfluidity in two-dimensional optical superlattices

Details Preparation and detection of d-wave superfluidity in two-dimensional optical superlattices Preparation and detection of d-wave superfluidity in two-dimensional optical superlattices

2008-06-02

arxiv.org/abs/0806.0166v1

EPL 87, 60001 (2009)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 6 figures

Scientific paper

We propose a controlled method to create and detect d-wave superfluidity with ultracold fermionic atoms loaded in two-dimensional optical superlattices. Our scheme consists in preparing an array of nearest-neighbor coupled square plaquettes or ``superplaquettes'' and using them as building blocks to construct a d-wave superfluid state. We describe how to use the coherent dynamical evolution in such a system to experimentally probe the pairing mechanism. We also derive the zero temperature phase diagram of the fermions in a checkerboard lattice (many weakly coupled plaquettes) and show that by tuning the inter-plaquette tunneling spin-dependently or varying the filling factor one can drive the system into a d-wave superfluid phase or a Cooper pair density wave phase. We discuss the use of noise correlation measurements to experimentally probe these phases.

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