Deterministic generation of a three-dimensional entangled state via quantum Zeno dynamics
Deterministic generation of a three-dimensional entangled state via quantum Zeno dynamics
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DOI：
10.1103/physreva.83.022322
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发表时间：
2011-02
影响因子：
2.9
通讯作者：
Wen-An Li;Guang-Yao Huang
中科院分区：
文献类型：
--
作者：
Wen-An Li;Guang-Yao Huang
提出了一种利用量子Zeno动力学产生囚禁在腔中的两个原子的三维纠缠态的方案。由于该方案是基于共振相互作用的，与色散协议相比，产生纠缠所需的时间非常短。我们证明了由此产生的有效动力学允许产生健壮的量子纠缠。研究了自发辐射、光子损失等各种退相干过程对纠缠态保真度的影响。数值结果表明，该方案对腔场衰变具有较强的鲁棒性，因为系统的演化被限制在具有零激发腔场的子空间中。此外，本方案还被推广到实现两原子的N维纠缠。
A scheme is proposed for the generation of a three-dimensional entangled state for two atoms trapped in a cavity via quantum Zeno dynamics. Because the scheme is based on the resonant interaction, the time required to produce entanglement is very short compared with the dispersive protocols. We show that the resulting effective dynamics allows for the creation of robust qutrit-qutrit entanglement. The influence of various decoherence processes such as spontaneous emission and photon loss on the fidelity of the entangled state is investigated. Numerical results show that the scheme is robust against the cavity decay since the evolution of the system is restricted to a subspace with null-excitation cavity fields. Furthermore, the present scheme has been generalized to realize N-dimensional entanglement for two atoms.