Multipartite entanglement transfer in a hybrid circuit-QED system

• DOI: 10.1007/s10773-011-1023-4
• Publication Date: 2011-11-23T00:37:25Z
• Authors: Qin-Qin Wu; Lan Xu; Qing-Shou Tan; Lin-Ling Yan
• Keywords: 0103 physical sciences; 01 natural sciences

We study the multi-qubit entanglement transfer in a hybrid circuit quantum electrodynamics system, where the memory and operation registers are, respectively, implemented using nitrogen-vacancy centers in diamond and superconducting charge qubits, because of their respective good coherence and controllability. We show that, with some local operations, both the Bell states and multi-qubit W states can be transferred perfectly in the non-dissipative case. In addition, we also consider the influence of the decoherence on the state transfer. It is found that a high-fidelity state transfer can be achieved only when the decoherence rates are much smaller than the coupling strength between the qubits.