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cond-mat.quant-gas2017★ 22 cited
Synchronization transition in dipole-coupled two-level systems with positional disorder
M. P. Kwasigroch, N. R. Cooper
We study the decoherence dynamics of dipole-coupled two-level quantum systems in Ramsey-type experiments. We focus on large networks of two-level systems, confined to two spatial d…
cond-mat.quant-gas2013★ 21 cited
Bose-Einstein Condensation and Many-Body Localization of Rotational Excitations of Polar Molecules
M. P. Kwasigroch, N. R. Cooper
We study theoretically the collective dynamics of rotational excitations of polar molecules loaded into an optical lattice in two dimensions. These excitations behave as hard-core…
cond-mat.quant-gas2012★ 8 cited
Quantum Fluctuations of Vortex Lattices in Ultracold Gases
M. P. Kwasigroch, N. R. Cooper
We discuss the effects of quantum fluctuations on the properties of vortex lattices in rapidly rotating ultracold atomic gases. We develop a variational method that goes beyond the…