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Abstract: We study the coherent quantum evolution of a closed and driven mesoscopicchain of two-level systems that interact via the van-der-Waals interaction intheir excited state. The Hamiltonian consists of a part corresponding to aclassical lattice gas and an off-diagonal driving term without classicalcounterpart. We show that in a certain parameter range the latter leads to athermalization of the system with respect to observables of the classicallattice gas such as the interaction energy and particle number distribution. Weinvestigate the evolution of the system into this thermal state and discuss howto determine the corresponding temperature. Our findings can be applied tounderstand thermalization in strongly interacting systems of laser-drivenRydberg atoms, ions or polar molecules.



Author: Igor Lesanovsky, Beatriz Olmos, Juan P. Garrahan

Source: https://arxiv.org/







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