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理论物理通讯：英文版

Effect of Intrinsic Decoherence of Milburn＇s Model on Entanglement of Two-Qutrit States

Qiu, Liang Liang, Wang, An-Min, Ma, Xiao-San

Published Jan 1, 2008• 1 citation
OpenAlex

Abstract

我们在 Milburn 内在的 decoherence 的模型的框架以内分析 two-qutrit 系统的纠纷的时间进化。纠纷进化系统的参数依靠不仅，而且在纯或混合的具体状态上。过去常测量内在的 decoherence 影响量状态到的程度的线性熵被评估。

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We study qutrit teleportation and its fidelity in the presence and absence of intrinsic decoherence through a qutrit channel. The channel consists of a Heisenberg chain with [Formula: see text] interaction model and the intrinsic decoherence is implemented through the Milburn model. It is shown that while the fidelity diminishes due to intrinsic decoherence, it may be enhanced if the channel is initially in an entangled state. It is also observed that, for stronger intrinsic decoherence, the initial entanglement of the channel is more effective in enhancing of fidelity.
考虑内在的 decoherence 效果， two-qubit 的纠纷各向异性的 Heisenberg XYZ 链面对 Dzyaloshinski Moriya (DM ) ，各向异性的 antisymetric 相互作用在这篇论文被调查。同时发生，纠纷的测量，被计算。与相比在 XY 飞机各向异性， DM 相互作用是另一种各向异性的反对称的交换相互作用。内在的 decoherence 显然压制纠纷的时间进化，这被显示出。当起始的状态是 |ψ (0 )= cosα|01 + sinα|10 并且削弱纠纷的度时， DM 相互作用仅仅对纠纷的时间进化起作用。在当系统开始在州的 |ψ (0 ) 时，飞机仅仅在纠纷的时间进化上影响的 XY 各向异性 = cosα|00 +sin α|11。足够地弱在飞机能有效地提高的 XY 各向异性纠纷的度。