doi:10.1103/PhysRevA.85.052320engHümmer, T.Reuther, G.M.Hänggi, P.Zueco, D.Nonequilibrium phases in hybrid arrays with flux qubits and nitrogen-vacancy centersART-2012-78293We propose a startling hybrid quantum architecture for simulating a localization-delocalization transition. The concept is based on an array of superconducting flux qubits which are coupled to a diamond crystal containing nitrogen-vacancy centers. The underlying description is a Jaynes-Cummings lattice in the strong-coupling regime. However, in contrast to well-studied coupled cavity arrays, the interaction between lattice sites is mediated here by the qubit rather than by the oscillator degrees of freedom. Nevertheless, we point out that a transition between a localized and a delocalized phase occurs in this system as well. We demonstrate the possibility of monitoring this transition in a nonequilibrium scenario, including decoherence effects. The proposed scheme allows the monitoring of localization-delocalization transitions in Jaynes-Cummings lattices by use of currently available experimental technology. Contrary to cavity-coupled lattices, our proposed recourse to stylized qubit networks facilitates (i) investigating localization-delocalization transitions in arbitrary dimensions and (ii) tuning the intersite coupling in situ.2012http://zaguan.unizar.es/record/6084010.1103/PhysRevA.85.052320http://zaguan.unizar.es/record/60840oai:zaguan.unizar.es:60840info:eu-repo/grantAgreement/ES/MINECO/CSD2007-046info:eu-repo/grantAgreement/ES/MINECO/FIS2011-25167PHYSICAL REVIEW A 85, 5 (2012), 052320 [7 pp]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess