Schemes for preparing atomic qubit cluster states in cavity QED

Pengfei Duan, Wei-Long Duan, Qiong-Si Fu +2 more

Zhou Yan-Li, Yang Li-Jia, Hong‐Yi Dai

We propose two schemes for the generation of cluster states in the context of cavity quantum electrodynamics (QED). In the first scheme, we prepare multi-cavity cluster states with information encoded in the coherent states. The second scheme is to generate multi-atom cluster states, where qubits are represented by the states of cascade Rydberg atoms. Both the schemes are based on the atom-cavity interaction and the atomic spontaneous radiation can be efficiently reduced since the cavity frequency is largely detuned from the atomic transition frequency.

Huai‐Zhi Wu, Zhen‐Biao Yang, Shi‐Biao Zheng

Yuanhua Li, Xiaolan Li, Yi-you Nie

XuBo Zou, Wolfgang M. Mathis

We propose two experimental schemes to generate the cluster states in the context of microwave cavity quantum electrodynamics (QED). In the first scheme to prepare many cavities into the cluster states, we encode the vacuum state and one-photon state of the microwave cavity as the logic zero and one of the qubits. The second scheme is to prepare many atoms into the cluster states, where qubits are represented by the states of Rydberg atoms. Both schemes require the resonant atom-cavity interaction so that the quantum dynamics operates at a high speed, which is important in view of decoherence.

张刚, 周建, 薛正远