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most citedQuantum rotor description of the Mott-insulator transition in the Bose-Hubbard model

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cond-mat.supr-con2003

Ground state properties of charge and magnetically frustrated two--dimensional quantum Josephson--junction arrays

T. K. Kopec, T. P. Polak

We study a quantum Hamiltonian that models an two--dimensional array of Josephson junctions with short range Josephson couplings, (given by the Josephson energy E_J and charging en…