97 citations · 463 across the 17 of their papers we have counts for
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Avalanche of entanglement and correlations at quantum phase transitions
Konstantin V. Krutitsky, Andreas Osterloh, Ralf Schützhold
We study the ground-state entanglement in the quantum Ising model with nearest neighbor ferromagnetic coupling and find a sequential increase of entanglement depth with growing…
Propagation of quantum correlations after a quench in the Mott-insulator regime of the Bose-Hubbard model
K. V. Krutitsky, P. Navez, F. Queisser +1
We study a quantum quench in the Bose-Hubbard model where the tunneling rate is suddenly switched from zero to a finite value in the Mott regime. In order to solve the many-bod…
Equilibration and prethermalization in the Bose-Hubbard and Fermi-Hubbard models
F. Queisser, K. V. Krutitsky, P. Navez +1
We study the Bose and Fermi Hubbard model in the (formal) limit of large coordination numbers . Via an expansion into powers of , we establish a hierarchy of correlatio…
Correlations in the Bose & Fermi Hubbard Model
Friedemann Queisser, Konstantin Krutitsky, Patrick Navez +1
We study the Bose-Hubbard and Fermi-Hubbard model in the limit of large coordination numbers Z (i.e., many tunnelling partners). Via a controlled expansion into powers of 1/Z, we e…
Interference scheme to measure light-induced nonlinearities in Bose-Einstein condensates
K. V. Krutitsky, K. -P. Marzlin, J. Audretsch
Light-induced nonlinear terms in the Gross-Pitaevskii equation arise from the stimulated coherent exchange of photons between two atoms. For atoms in an optical dipole trap this ef…
Local-field effect in atom optics of two-component Bose-Einstein condensates
K. V. Krutitsky, K. -P. Marzlin, J. Audretsch
Starting from the first principles of nonrelativistic QED we have developed the quantum theory of the interaction of a two-component ultracold atomic ensemble with the electromagne…