2 papers
quant-ph2013
Ab initio derivation of Hubbard models for cold atoms in optical lattices
R. Walters, G. Cotugno, T. H. Johnson +2
We derive ab initio local Hubbard models for several optical lattice potentials of current interest, including the honeycomb and Kagomé lattices, verifying their accuracy on each o…
quant-ph2009
Decoherence of a quantum memory coupled to a collective spin bath
Richard Walters, Stephen R. Clark, Dieter Jaksch
We study the quantum dynamics of a single qubit coupled to a bath of interacting spins as a model for decoherence in solid state quantum memories. The spin bath is described by the…