共查询到9条相似文献,搜索用时 5 毫秒
1.
Yong-Hong Ma Feng-Zhi Li Xiang-Gang Han E Wu 《International Journal of Theoretical Physics》2016,55(5):2386-2396
We propose a scheme for the realization of a hybrid, strongly entangled system formed of an atomic ensemble surrounded by a quadratically coupled optomechanical cavity with a vibrating mirror. We firstly investigate the steady-state bipartite entanglement between the movable mirror and the cavity mode with the help of an atomic media. It shows that the introduction of the atomic medium can greatly improve the entanglement between the movable mirror and the cavity mode. Secondly, steady-state tripartite entanglement including the movable mirror, the cavity and atom media are investigated. We find the robust tripartite entanglement persists in the present system. 相似文献
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在强激光场中三维二能级氢原子模型的基础上, 对其含时Schr\"{o}dinger方程进行了非微扰的数值求解, 得到了激光场的高次谐波谱. 相似文献
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原子与弱相干腔场相互作用系统中的量子特性 总被引:1,自引:0,他引:1
考虑腔场处于弱相干态的情况,研究了两个全同的二能级原子与耦合腔相互作用系统中原子的偶极压缩和原子间的纠缠特性。研究结果表明,随耦合腔耦合系数增大,原子的偶极压缩减弱。另一方面,随耦合腔耦合系数增大,原子间的纠缠也减弱,这一结果与耦合腔处于真空态的情况相反。 相似文献
4.
双光子过程耦合腔系统中的纠缠特性 总被引:3,自引:3,他引:0
研究了双光子过程原子与耦合腔相互作用系统,给出了系统总激发数等于2时态矢的演化。采用负本征值来描述两个子系统间的纠缠,利用数值计算方法研究了系统中原子与原子间、腔场与腔场间和原子与腔场间的纠缠特性。讨论了腔场间的耦合强度变化对纠缠特性的影响。研究结果表明:随着腔场间耦合的增强,两原子间的纠缠增强,但原子与腔场间和两腔场间的纠缠却减弱。 相似文献
5.
We present a scheme to implement a one-qubit phase gate with a two-level atom crossing an optical cavity in which some identical atoms are trapped. One can conveniently acquire an arbitrary phase shift of the gate by properly choosing the number of atoms trapped in the cavity and the velocity of the atom crossing the cavity. The present scheme provides a very simple and efficient way for implementing one-qubit phase gate. 相似文献
6.
A phonon blockade is achieved in a hybrid optomechanical system including an ensemble of two-level quantum emitters. The introduction of the ensemble of quantum emitters sets up a mechanism of quantum destructive interference within the system, by which the phonon statistical characteristic exhibits strong antibunching under the condition of weak driving and weak coupling. By analyzing the analytic solution of the second-order correlation function, the optimal parametric condition for ideal phonon blockade effect is obtained. The numerical simulation of the second-order correlation function perfectly accord with the analytical solution. The validity of the effective Hamiltonian is proved by the numerical simulations with quantum master equation. The proposed scheme provides a possible way to realize the single-phonon source experimentally. 相似文献
7.
电光双稳系统中混沌控制的动态存储 总被引:2,自引:0,他引:2
报道了电光双稳系统输出振荡混沌区的二次反分岔区域中使用连续自反馈控制的方法实现动态存储的实验研究。李雅普诺夫指数分析和计算机数值模拟表明这处方法是可行的,混沌控制前后输出振荡分岔图的对比显示了使用这种方法实现稳定动态存储的物理机制。实验结果与理论模拟一致,动态存储,电光双稳系统。 相似文献
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研究了光纤耦合腔A和B中各囚禁一个和两个二能级原子的情况,给出了总激发数为1时系统态矢的演化。采用Negativity熵来描述两个子系统间的纠缠,利用数值计算方法研究了腔内原子与原子间和腔场与腔场间的纠缠特性,讨论了光纤模与腔场间的耦合强度变化对纠缠特性的影响。另一方面还研究了对腔A中原子选择性测量对纠缠特性的影响。研究结果表明:随光纤模与腔场间的耦合系数增大,腔场间纠缠减弱。原子间纠缠与光纤模与腔场间的耦合系数间存在非线性关系。另一方面,采用原子态选择性测量方法,可增强腔内原子间和腔场间的纠缠。 相似文献