1202.2084 (Chui-Ping Yang et al.)

Generation of GHZ entangled states of photons in multiple cavities via a
superconucting qubit or an atom through resonant interaction    [PDF]

Chui-Ping Yang, Siyuan Han

We propose a method to generate a GHZ entangled state of n photons in n
microwave cavities (or resonators) via resonant interaction to a single
superconducting qubit. By performing local operations on a qubit (e.g., a
solid-state qubit, an atom, etc.) placed in each cavity, the created GHZ states
of n photons can be transferred to qubits for storage. The proposed scheme
greatly reduces effect of decoherence since only resonant qubit-cavity
interaction and resonant qubit-pulse interaction are involved, and no
measurement is required. In addition, we show that the method can be applied to
create a GHZ state of photons in multiple cavities via an atom through resonant
interaction with no measurement needed.

View original: http://arxiv.org/abs/1202.2084