A coherence preservation control strategy in cavity QED based on classical quantum feedback.

A coherence preservation control strategy in cavity QED based on classical quantum feedback.
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基于经典量子反馈的腔QED相干性保持控制策略

DOI:
10.1155/2013/340917
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发表时间:
2013
影响因子:
--
通讯作者:
Gao J
Gao J
中科院分区:
其他
文献类型:
--
作者:
Li M;Chen W;Gao J

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为了消除腔量子电动力学(腔QED)中的退相干效应,从光学布洛赫方程出发,从理论上推导了拉比振荡的传递函数。特别地,考虑了原子自发辐射在腔QED中的退相干。提出了一种反馈控制策略,通过拉比振荡稳定来保持相干性。该方案利用量子层析技术构建了一个用于量子信息获取的经典量子反馈通道,并提出了一个基于根轨迹理论的补偿系统来抑制原子的自发辐射和退相干。仿真结果证明了该方法在相干保持方面的有效性和优越性。
For eliminating the unexpected decoherence effect in cavity quantum electrodynamics (cavity QED), the transfer function of Rabi oscillation is derived theoretically using optical Bloch equations. In particular, the decoherence in cavity QED from the atomic spontaneous emission is especially considered. A feedback control strategy is proposed to preserve the coherence through Rabi oscillation stabilization. In the scheme, a classical quantum feedback channel for the quantum information acquisition is constructed via the quantum tomography technology, and a compensation system based on the root locus theory is put forward to suppress the atomic spontaneous emission and the associated decoherence. The simulation results have proved its effectiveness and superiority for the coherence preservation.
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