Nonequilibrium phases in hybrid arrays with flux qubits and nitrogen-vacancy centers

Hümmer, T. ; Reuther, G.M. ; Hänggi, P. ; Zueco, D. (Universidad de Zaragoza)

Resumen: We 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.

Idioma: Inglés

DOI: 10.1103/PhysRevA.85.052320

Año: 2012

Publicado en: PHYSICAL REVIEW A 85, 5 (2012), 052320 [7 pp]
ISSN: 1050-2947

Factor impacto JCR: 3.042 (2012)

Categ. JCR: OPTICS rank: 7 / 79 = 0.089 (2012) - Q1 - T1
Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 9 / 34 = 0.265 (2012) - Q2 - T1

Financiación: info:eu-repo/grantAgreement/ES/MINECO/CSD2007-046
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2011-25167

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Física de la Materia Condensada (Departamento de Física de la Materia Condensada)