Fully-connected network of superconducting qubits in a cavity

Details Fully-connected network of superconducting qubits in a cavity Fully-connected network of superconducting qubits in a cavity

2008-02-11

arxiv.org/abs/0802.1469v2

New J. Phys. 10, 113020 (2008)

Physics

Quantum Physics

11 pages, 4 figures. Replaced with published version; made explicit connection with finite LMG model

Scientific paper

10.1088/1367-2630/10/11/113020

A fully-connected qubit network is considered, where every qubit interacts with every other one. When the interactions between the qubits are homogeneous, the system is a special case of the finite Lipkin-Meshkov-Glick model. We propose a natural implementation of this model using superconducting qubits in state-of-the-art circuit QED. The ground state, the low-lying energy spectrum and the dynamical evolution are investigated. We find that, under realistic conditions, highly entangled states of Greenberger-Horne-Zeilinger and W types can be generated. We also comment on the influence of disorder on the system and discuss the possibility of simulating complex quantum systems, such as Sherrington-Kirkpatrick spin glasses, with superconducting qubit networks.

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