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理论物理通讯：英文版

Dynamics of Entanglement for a Two-Parameter Class of States in a Qubit-Qutrit System

Hai‐Rui Wei, 任宝藏, Tao Li, Hua Ming, Fu‐Guo Deng

Published Jan 1, 2012• 0 citations
OpenAlex

Abstract

我们在各种各样的消散的隧道的影响下面在一个混合 qubit-qutrit 系统为状态的一个二参数的类调查纠纷的动力学。我们的结果显示出突然的死亡(ESD ) 是的那件纠纷一般现象和它通常在与其它观察的 dephasing 和动摇隧道与各种各样的吵闹的隧道，不是仅仅案例交往的一个 qubit-qutrit 系统发生。ESD 能仅仅在一些特别吵闹的隧道下面为一些开始纠缠的状态被避免。而且，环境以很不同的方法影响纠纷和系统的连贯。

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我们在各种各样的消散的隧道的影响下面在一个混合 qubit-qutrit 系统为状态的一个二参数的类调查纠纷的动力学。我们的结果显示出突然的死亡(ESD ) 是的那件纠纷一般现象和它通常在与其它观察的 dephasing 和动摇隧道与各种各样的吵闹的隧道，不是仅仅案例交往的一个 qubit-qutrit 系统发生。ESD 能仅仅在一些特别吵闹的隧道下面为一些开始纠缠的状态被避免。而且，环境以很不同的方法影响纠纷和系统的连贯。
We investigate the dynamics of entanglement for a two-parameter class of states in a hybrid qubit-qutrit system under the influence of various dissipative channels. Our results show that entanglement sudden death (ESD) is a general phenomenon and it usually takes place in a qubit-qutrit system interacting with various noisy channels, not only the case with dephasing and depolarizing channels observed by others. ESD can only be avoided for some initially entangled states under some particular noisy channels. Moreover, the environment affects the entanglement and the coherence of the system in very different ways.
Abstract In this present paper, we study the entanglement dynamics in qubit A-qutrit B pair under x component of Dzyaloshinshkii–Moriya interaction (D x ) by taking an auxiliary qubit C. Here, we consider an entangled qubit-qutrit pair initially prepared in two parameter qubit-qutrit states and one auxiliary qubit prepared in pure state interacts with the qutrit of the pair through DM interaction. We trace away the auxiliary qubit and calculate the reduced dynamics in qubit A-qutrit B pair to study the influence of the state of auxiliary qubit C and D x on entanglement. We find that the state (probability amplitude) of auxiliary qubit does not influence the entanglement, only D x influences the same. The phenomenon of entanglement sudden death (ESD) induced by D x has also been observed. We also present the affected and unaffected two parameter qubit-qutrit states by D x .