| Controllable preparation of two-mode entangled coherent states in circuit QED |
| |
| 作者姓名： | 嵇英华 刘咏梅 |
| |
| 作者单位： | Department of Physics, Jiangxi Normal University;Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province;College of Mathematics and Information Science, Jiangxi Normal University |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant No. 11264015）. |
| |
| 摘 要： | Although the multi-level structure of superconducting qubits may result in calculation errors, it can be rationally used to effectively improve the speed of gate operations. Utilizing a current-biased Josephson junction （A-type rf-SQUID） as a tunable coupler for superconducting transmission line resonators （TLRs）, under the large detuning condition, we demonstrate the controllable generation of entangled coherent states in circuit quantum electrodynamics （circuit QED）. The coupling between the TLRs and the qubit can be effectively regulated by an external bias current or coupling capacitor. Further investigations indicate that the maximum entangled state can be obtained through measuring the excited state of the superconducting qubits. Then, the influence of the TLR tecay on the prepared entangled states is analyzed.
|
| 关 键 词： | 纠缠相干态 可控制备 QED 电路 Toll样受体 超导传输线 最大纠缠态 量子电动力学 |
Controllable preparation of two-mode entangled coherent states in circuit QED |
| |
| Affiliation: | [1]Department of Physics, Jiangxi Normal University, Nanchang 330022, China; [2]Key Laboratory of Photoelectronics and Telecommunication of Jiangxi Province, Nanchang 330022, China; [3]College of Mathematics and Information Science, Jiangxi Normal University, Nanchang 330022, China |
| |
| Abstract: | circuit QED, preparation of quantum state, entangled coherent state, concurrence |
| |
| Keywords: | circuit QED preparation of quantum state entangled coherent state concurrence |
| 本文献已被 CNKI 维普 等数据库收录！ |
