Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 6: Superconductivity: Tunnelling & Josephson Junctions
TT 6.5: Vortrag
Montag, 11. März 2013, 10:30–10:45, H18
Tripartite GHZ generation scheme in presence of bosonic baths — •Samuele Spilla1, Rosanna Migliore2, Matteo Scala1, and Anna Napoli1 — 1Dipartimento di Fisica, Università di Palermo, via Archirafi 36, 90123 Palermo, Italy — 2Institute of Biophysics, National Research Council, via U. La Malfa 153, 90146 Palermo, Italy
We analyse an entangling protocol to generate tripartite Greenberger-Horne-Zeilinger (GHZ) states in a system consisting of three superconducting qubits with pairwise coupling. The dynamics of the open quantum system is investigated by taking into account the interaction of each qubit with an independent bosonic bath with an ohmic spectral structure. To this end, a microscopic master equation is constructed and exactly solved. We find that the protocol discussed here is stable against decoherence and dissipation due to the presence of the external baths.