d-Wave resonating valence bond states of fermionic atoms in optical lattices

Phys Rev Lett. 2006 Jun 30;96(25):250402. doi: 10.1103/PhysRevLett.96.250402. Epub 2006 Jun 29.

Abstract

We study controlled generation and measurement of superfluid d-wave resonating valence bond (RVB) states of fermionic atoms in 2D optical lattices. Starting from loading spatial and spin patterns of atoms in optical superlattices as pure quantum states from a Fermi gas, we adiabatically transform this state to an RVB state by a change of the lattice parameters. Results of exact time-dependent numerical studies for ladders systems are presented, suggesting generation of RVB states on a time scale smaller than typical experimental decoherence times.