Determination of maximal Gaussian entanglement achievable by feedback-controlled dynamics.

Determination of maximal Gaussian entanglement achievable by feedback-controlled dynamics.
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确定反馈控制动力学可实现的最大高斯纠缠。

DOI:
10.1103/physrevlett.104.220501
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发表时间:
2009
影响因子:
8.6
通讯作者:
S. Mancini
S. Mancini
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
A. Serafini;S. Mancini

文献摘要

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对于具有任意多个玻色自由度的系统,我们确定了通过连续反馈可以实现的稳态纠缠的一般上界。我们将这样的界限应用于参数相互作用的特定情况--量子光学中最常见的产生纠缠的实用方法--并挑选出实现最大纠缠的最佳反馈策略。我们还考虑了反馈方案完全限于局部操作的情况,并将它们的性能与最优的、通常是非局部的方案进行了比较。
We determine a general upper bound for the steady-state entanglement achievable by continuous feedback for a system of any number of bosonic degrees of freedom. We apply such a bound to the specific case of parametric interactions--the most common practical way to generate entanglement in quantum optics--and single out optimal feedback strategies that achieve the maximal entanglement. We also consider the case of feedback schemes entirely restricted to local operations and compare their performance to the optimal, generally nonlocal, schemes.