1106.3237 (Chui-Ping Yang et al.)

Generating entanglement among microwave photons and qubits in multiple
cavities coupled by a superconducting qubit    [PDF]

Chui-Ping Yang, Qi-Ping Su, Shi-Biao Zheng, Siyuan Han

We discuss how to generate entangled coherent states of four \textrm{microwave} resonators \textrm{(a.k.a. cavities)} coupled by a superconducting qubit. We also show \textrm{that} a GHZ state of four superconducting qubits embedded in four different resonators \textrm{can be created with this scheme}. In principle, \textrm{the proposed method} can be extended to create an entangled coherent state of $n$ resonators and to prepare a Greenberger-Horne-Zeilinger (GHZ) state of $n$ qubits distributed over $n$ cavities in a quantum network. In addition, it is noted that four resonators coupled by a coupler qubit may be used as a basic circuit block to build a two-dimensional quantum network, which is useful for scalable quantum information processing.

View original: http://arxiv.org/abs/1106.3237