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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Amplitude damping effects on controlled teleportation of a qubit by a tripartite W state
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Amplitude damping effects on controlled teleportation of a qubit by a tripartite W state

机译:振幅阻尼对三重态W态对量子比特受控传输的影响

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We investigate the influence of amplitude damping at every stage of the unitary operation of controlled teleportation of a qubit by a tripartite W state in the Bloch sphere representation. We use the average fidelity to describe how much information is transferred from the initial state to the teleported state. It is shown that when a depolarized three-particle W state is used as the quantum channel, the average fidelity of teleportation is a function of the decoherence rate p and the depolarizing rate p'. The larger the depolarizing rate is, the smaller the amplitude damping effect on the average fidelity is. Moreover, the average fidelity of teleportation with values larger than 2/3 can be obtained when the values of p and p' are chosen properly.
机译:我们研究了在Bloch球面表示中由三重W态对量子位的受控隐形传态的统一操作的每个阶段的振幅阻尼的影响。我们使用平均保真度来描述从初始状态转移到传送状态的信息量。结果表明,当使用去极化的三粒子W态作为量子通道时,平均隐形传质是去相干率p和去极化率p'的函数。去极化率越大,对平均保真度的振幅衰减效果越小。而且,当适当地选择p和p′的值时,可以获得大于2/3的值的远传平均保真度。

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